Katharine McPhee changes last name after David Foster wedding

That didn’t take long! Hours after Katharine McPhee tied the knot with David Foster, the American Idol alum made things social media official by taking his last name on Twitter and Instagram.

“Introducing Katharine Foster,” the Waitress actress, 35, tweeted on Saturday, June 29, and also went from “Katharine McPhee” to “Katharine Foster” on Instagram that same day. And it wasn’t just for show — Katharine legally took David’s last name after the pair tied the knot in London on Friday, June 28.

Katharine “looked so pretty” in a strapless, custom Zac Posen gown as she wed the music producer, 69, at the Church of Saint Yeghiche, a source told Us Weekly. The spouses said their vows in front of an estimated 100 friends and family including David’s daughters Sara and Erin Foster.

Prior to the ceremony, the Smash alum took to Instagram to share a heartfelt message to her new husband. “Exactly 13 years ago today my very first single, Somewhere Over The Rainbow, was released right after Idol. Today… I’m marrying the man who produced it,” Katharine wrote alongside a video of her singing the tune while the Grammy winner played the piano. “Life is full of beautiful coincidences, isn’t it? Thank you for taking me over the rainbow, David.”

32 PHOTOS
Katharine McPhee and David Foster from 2006 until now
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Katharine McPhee and David Foster from 2006 until now
WINDSOR, ENGLAND - JUNE 27: David Foster (L) and Katharine McPhee attend the Argento Ball for the Elton John AIDS Foundation in association with BVLGARI & Bob and Tamar Manoukian on June 27, 2018 in Windsor, England. (Photo by David M. Benett/Dave Benett/Getty Images for BVLGARI and EJAF)
WINDSOR, ENGLAND - JUNE 27: David Foster (L) and Katharine McPhee attend the Argento Ball for the Elton John AIDS Foundation in association with BVLGARI & Bob and Tamar Manoukian on June 27, 2018 in Windsor, England. (Photo by David M. Benett/Dave Benett/Getty Images for BVLGARI and EJAF)
NEW YORK, NY - JUNE 01: (EXCLUSIVE COVERAGE) David Foster and Katharine McPhee attend the 2018 Stars In The Alley celebrating the end of the Broadway 2017-2018 season on June 1, 2018 in New York City. (Photo by Bruce Glikas/FilmMagic)
NEW YORK, NY - MAY 07: David Foster and Katharine McPhee attend the Heavenly Bodies: Fashion & The Catholic Imagination Costume Institute Gala at The Metropolitan Museum of Art on May 7, 2018 in New York City. (Photo by Neilson Barnard/Getty Images)
NEW YORK, NY - MAY 07: Katharine McPhee and David Foster attend the Heavenly Bodies: Fashion & The Catholic Imagination Costume Institute Gala at The Metropolitan Museum of Art on May 7, 2018 in New York City. (Photo by Kevin Mazur/MG18/Getty Images for The Met Museum/Vogue)
NEW YORK, NY - APRIL 06: David Foster, Katharine Mcphee are seen in Tribeca on April 6, 2018 in New York City. (Photo by Alo Ceballos/GC Images)
WEST HOLLYWOOD, CA - MARCH 04: (L-R) David Foster, Katharine McPhee, Petra Nemcova and guest attend the 26th annual Elton John AIDS Foundation Academy Awards Viewing Party sponsored by Bulgari, celebrating EJAF and the 90th Academy Awards at The City of West Hollywood Park on March 4, 2018 in West Hollywood, California. (Photo by Michael Kovac/Getty Images for EJAF)
WEST HOLLYWOOD, CA - MARCH 04: (L-R) ---, Lionel Richie, Lisa Parigi, Katharine McPhee, and David Foster attend the 26th annual Elton John AIDS Foundation Academy Awards Viewing Party sponsored by Bulgari, celebrating EJAF and the 90th Academy Awards at The City of West Hollywood Park on March 4, 2018 in West Hollywood, California. (Photo by Dimitrios Kambouris/Getty Images for EJAF)
WEST HOLLYWOOD, CA - MARCH 04: David Foster (L) and Katharine McPhee attend the 26th annual Elton John AIDS Foundation Academy Awards Viewing Party at The City of West Hollywood Park on March 4, 2018 in West Hollywood, California. (Photo by John Sciulli/Getty Images for Perry Ellis)
CARPINTERIA, CA - FEBRUARY 25: Musicians Katharine McPhee (L) and David Foster (R) perform onstage during the One 805 Kick Ash Bash benefiting First Responders at Bella Vista Ranch & Polo Club on February 25, 2018 in Carpinteria, California. (Photo by Scott Dudelson/Getty Images)
LOS ANGELES, CA - MARCH 04: Katharine McPhee (L) and David Foster attend Elton John AIDS Foundation 26th Annual Academy Awards Viewing Party at The City of West Hollywood Park on March 4, 2018 in Los Angeles, California. (Photo by Venturelli/Getty Images for Bulgari)
MALIBU, CA - NOVEMBER 15: David Foster and Katharine McPhee attend Bumble Bizz Los Angeles Launch Dinner At Nobu Malibu at Nobu Malibu on November 15, 2017 in Malibu, California. (Photo by Charley Gallay/Getty Images for Bumble)
MALIBU, CA - NOVEMBER 15: Kim Kardashian, David Foster and Katharine McPhee attend Bumble Bizz Los Angeles Launch Dinner At Nobu Malibu at Nobu Malibu on November 15, 2017 in Malibu, California. (Photo by Charley Gallay/Getty Images for Bumble)
BEVERLY HILLS, CA - NOVEMBER 09: (L-R) Honoree Lionel Richie, Lisa Parigi, Katharine McPhee, and David Foster attend the SAG-AFTRA Foundation Patron of the Artists Awards 2017 at the Wallis Annenberg Center for the Performing Arts on November 9, 2017 in Beverly Hills, California. (Photo by Matt Winkelmeyer/Getty Images for SAG-AFTRA Foundation )
BEVERLY HILLS, CA - NOVEMBER 09: (L-R) Honoree Lionel Richie, Lisa Parigi, Katharine McPhee, and David Foster attend the SAG-AFTRA Foundation Patron of the Artists Awards 2017 at the Wallis Annenberg Center for the Performing Arts on November 9, 2017 in Beverly Hills, California. (Photo by Matt Winkelmeyer/Getty Images for SAG-AFTRA Foundation)
LOS ANGELES, CA - NOVEMBER 05: David Foster and Katharine McPhee attend a basketball game between the Los Angeles Lakers and the Memphis Grizzlies at Staples Center on November 5, 2017 in Los Angeles, California. (Photo by Allen Berezovsky/Getty Images)
LOS ANGELES, CA - NOVEMBER 05: David Foster and Katharine McPhee attend a basketball game between the Los Angeles Lakers and the Memphis Grizzlies at Staples Center on November 5, 2017 in Los Angeles, California. (Photo by Allen Berezovsky/Getty Images)
LOS ANGELES, CA - NOVEMBER 05: David Foster and Katharine McPhee attend a basketball game between the Los Angeles Lakers and the Memphis Grizzlies at Staples Center on November 5, 2017 in Los Angeles, California. (Photo by Allen Berezovsky/Getty Images)
LOS ANGELES, CA - NOVEMBER 05: David Foster and Katharine McPhee attend a basketball game between the Los Angeles Lakers and the Memphis Grizzlies at Staples Center on November 5, 2017 in Los Angeles, California. (Photo by Allen Berezovsky/Getty Images)
LOS ANGELES, CA - NOVEMBER 5: David Foster and Katharine McPhee attend the Los Angeles Lakers vs. Memphis Grizzlies basketball game at Staples Center on November 5 2017, in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)
LOS ANGELES, CA - NOVEMBER 05: David Foster and Katharine McPhee attend a basketball game between the Los Angeles Lakers and the Memphis Grizzlies at Staples Center on November 5, 2017 in Los Angeles, California. (Photo by Allen Berezovsky/Getty Images)
LOS ANGELES, CA - NOVEMBER 5: David Foster and Katharine McPhee attend the Los Angeles Lakers vs. Memphis Grizzlies basketball game at Staples Center on November 5 2017, in Los Angeles, California. (Photo by Kevork Djansezian/Getty Images)
MALIBU, CA - APRIL 24: (Exclusive Coverage) Katharine McPhee and David Foster attend Barbra Streisand's 75th birthday at Cafe Habana on April 24, 2017 in Malibu, California. (Photo by Kevin Mazur/WireImage)
VANCOUVER, BC - OCTOBER 21: (L-R) David Foster and Katharine McPhee attend the David Foster Foundation Gala at Rogers Arena on October 21, 2017 in Vancouver, Canada. (Photo by Andrew Chin/Getty Images)
LOS ANGELES, CA - SEPTEMBER 19: David Foster and Katharine McPhee backstage during the 2017 GRAMMY Museum Gala Honoring David Foster at The Novo by Microsoft on September 19, 2017 in Los Angeles, California. (Photo by Alison Buck/WireImage for The Recording Academy )
VANCOUVER, BC - OCTOBER 21: (L-R) Katharine McPhee and David Foster attend the David Foster Foundation Gala at Rogers Arena on October 21, 2017 in Vancouver, Canada. (Photo by Andrew Chin/Getty Images)
LOS ANGELES, CA - SEPTEMBER 19: Musician David Foster and actress/singer Katharine McPhee attend the 2017 GRAMMY Museum Gala Honoring David Foster at The Novo by Microsoft on September 19, 2017 in Los Angeles, California. (Photo by Alison Buck/WireImage for The Recording Academy )
Producer David Foster and singer/songwriter Katharine McPhee attend the Jane Seymour Open Hearts Foundation Inaugural Celebration at a Private Residence on February 19, 2011 in Malibu, California. (Photo by Angela Weiss/WireImage)
WASHINGTON - NOVEMBER 16: Music producer David Foster and Katharine McPhee at the 'Kaleidoscope' rehearsal presented by sanofi-aventis US airing nationally on Thanksgiving Day on FOX at Verizon Center on November 16, 2009 in Washington, DC. (Photo by Paul Morigi/Getty Images for Edge Health)
David Foster, Katharine McPhee and guest during Mercedes-Benz Presents the 17th Carousel of Hope Ball - Backstage and Audience at Beverly Hills Hilton in Beverly Hills, California, United States. (Photo by M. Caulfield/WireImage)
Katharine McPhee and David Foster during JCPenney Jam Press Conference - June 13, 2006 at Shrine Auditorium in Los Angeles, California, United States. (Photo by Todd Williamson/FilmMagic)
'American Idol' Season 5 - David Foster, Andrea Bocelli, Top 6 Finalists, Katharine McPhee, 21, from Sherman Oaks, California, Paris Bennett, 17, from Fayettesville, Georgia, Kellie Pickler, 19, of Albemarle, North Carolina and Ryan Seacrest, host *EXCLUSIVE* ***Exclusive*** (Photo by Ray Mickshaw/WireImage for Fox Television Network)
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Katharine later changed into an ice-blue gown for an evening wedding reception. She paired her look with strappy heels and minimal jewelry with her best accessory — her beau — holding tight to her hand. David looked handsome in an all-black suit and bow tie.

David also took to Instagram on Saturday to gush over his bride. “I’m in the best seat ever!” he captioned a picture of Katharine in her wedding dress, holding onto her pink bouquet.

The Canada native proposed to the singer in July 2018 during a romantic Italian vacation. “Katharine is telling close friends she doesn’t want to have a long engagement,” a source told Us at the time. “They are very much in love.”

David was previously married to B.J. Cook, Rebecca Dyer, Linda Thompson and Yolanda Hadid and is the father of five daughters, Allison, Amy, Sara, Erin and Jordan. Katharine, for her part, was previously married to Nick Cokas.

46 PHOTOS
Katharine McPhee's style transformation
See Gallery
Katharine McPhee's style transformation
Katharine McPhee during "American Idol" Season 5 - Finale - Press Room at Kodak Theater in Hollywood, California, United States. (Photo by Jon Kopaloff/FilmMagic)
"American Idol" Season 5 - Top 2 Finalist, Katharine McPhee, 21, from Sherman Oaks, California (Photo by Jason Merritt/FilmMagic)
"American Idol" Season 5 - Runner-Up Katharine McPhee, 21, from Sherman Oaks, California, performs "I've Had the Time of My Life" (Photo by Jason Merritt/FilmMagic)
NEW YORK - JULY 26: American Idol Katharine McPhee attends a press conference where she announced she will be the new spokesmodel for Sexy Hair care products at The Ritz Carlton July 26, 2006 in New York City. (Photo by Peter Kramer/Getty Images)
LAS VEGAS - JUNE 16: Singer and American idol runner-up Katharine McPhee arrives at the fourth anniversary party for Vegas Magazine on the closing night of the CineVegas film festival at the Mandalay Bay Resort & Casino June 16, 2007 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images for CineVegas)
LOS ANGELES, CA - JULY 12: Singer Katharine McPhee attends the Grammy Foundation's Annual Signature Starry Night Gala at USC on July 12, 2008 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
©2008 credit NCNA only Singer Katherine McPhee attends the 2008 Teen Choice Awards at Universal Studios in Los Angeles on August 3, 2008.XYZ (Photo by Philip Ramey/Corbis via Getty Images)
NEW YORK - AUGUST 18: Katharine McPhee visits MTV's "TRL" at MTV studios on August 18, 2008 in New York City. (Photo by Theo Wargo/WireImage)
Actress-singer Katharine McPhee arrives at the Los Angeles premiere of "The House Bunny" at the Mann Village Theatre on August 20, 2008 in Westwood, California. (Photo by Jon Kopaloff/FilmMagic)
NEW YORK - AUGUST 18: Singer/Actress Katharine McPhee attends the premiere of "The House Bunny" at the Hearst Tower on August 18, 2008 in New York City. (Photo by Dimitrios Kambouris/WireImage)
NEW YORK CITY, NY - SEPTEMBER 9: Katharine McPhee attends PRADA Presents "Fallen Shadows" at Prada Epicenter on September 9, 2008 in New York City. (Photo by CLINT SPAULDING/Patrick McMullan via Getty Imagess)
LOS ANGELES, CA - OCTOBER 30: Actress Katharine McPhee attends the Blackberry Bold launch party at a private residence on October 30, 2008 in Beverly Hills, California. (Photo by John Shearer/WireImage)
NEW YORK - SEPTEMBER 16: American Idol runner-up singer/songwriter Katharine McPhee attends The Cinema Society and Links of London's screening of "The Invention Of Lying" at the Tribeca Grand Screening Room on September 16, 2009 in New York City. (Photo by Charles Eshelman/FilmMagic)
Katharine McPhee arrives at the 1st Annual Global Action Awards Gala held at at The Beverly Hilton hotel on February 18, 2011 in Beverly Hills, California.
Katharine McPhee attends the QVC Red Carpet Style Party held at the Four Seasons Hotel Los Angeles on February 25, 2011 in Los Angeles, California. (Photo by Jeffrey Mayer/WireImage)
BEVERLY HILLS, CA - JANUARY 15: Actress-singer Katharine McPhee arrive at the 69th Annual Golden Globe Awards at The Beverly Hilton hotel on January 15, 2012 in Beverly Hills, California. (Photo by George Pimentel/WireImage)
BEVERLY HILLS, CALIFORNIA - JANUARY 13: Actress Katharine McPhee arrives at the 70th Annual Golden Globe Awards held at The Beverly Hilton Hotel on January 13, 2013 in Beverly Hills, California. (Photo by George Pimentel/WireImage)
PASADENA, CA - JANUARY 06: Actress Katharine McPhee attends the NBCUniversal 2013 TCA Winter Press Tour at The Langham Huntington Hotel and Spa on January 6, 2013 in Pasadena, California. (Photo by Christopher Polk/NBC/Getty Images)
LATE NIGHT WITH JIMMY FALLON -- Episode 775 -- Pictured: Actress Katharine McPhee arrives on February 4, 2013 -- (Photo by: Lloyd Bishop/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - FEBRUARY 06: Katherine McPhee attends the amfAR New York Gala To Kick Off Fall 2013 Fashion Week at Cipriani Wall Street on February 6, 2013 in New York City. (Photo by Kevin Mazur/WireImage)
NEW YORK, NY - FEBRUARY 10: Katharine McPhee as seen on February 10, 2013 in New York City. (Photo by NCP/Star Max/FilmMagic)
HOLLYWOOD, CA - JUNE 11: Actress Katharine McPhee attends the season 6 premiere of HBO's "True Blood" at ArcLight Cinemas Cinerama Dome on June 11, 2013 in Hollywood, California. (Photo by Jason LaVeris/FilmMagic)
TORONTO, ON - SEPTEMBER 28: singer Katharine McPhee attends the 2013 Bliss Ball benefit for Sick Kids Hospital held at Sunnybrook Estates on September 28, 2013 in Toronto, Canada. (Photo by George Pimentel/WireImage)
Actress Katherine McPhee arrives at Elle Magazine 15th Annual Women in Hollywood Tribute held at The Four Seasons Hotel. (Photo by Frank Trapper/Corbis via Getty Images)
LOS ANGELES, CA - SEPTEMBER 15: Actress Katharine McPhee attends the 2013 Creative Arts Emmy Awards at Nokia Theatre L.A. Live on September 15, 2013 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - OCTOBER 20: Actress Katharine McPhee attends the Barlow Respiratory Hospital;s 4th Annual Bernie Brillstein Golf Classic Awards Dinner at the Wilshire Country Club on October 20, 2014 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images)
MALIBU, CA - DECEMBER 15: Singer/actress Katharine McPhee attends the Haute Living and Dom Perignon honoring of Relativity CEO Ryan Kavanaugh at Nobu Malibu on December 15, 2014 in Malibu, California. (Photo by Imeh Akpanudosen/WireImage for Haute Living)
BEVERLY HILLS, CA - JANUARY 11: Actress Katharine McPhee attends the 2015 InStyle and Warner Bros. 72nd Annual Golden Globe Awards Post-Party at The Beverly Hilton Hotel on January 11, 2015 in Beverly Hills, California. (Photo by David Livingston/Getty Images)
BEVERLY HILLS, CA - JANUARY 10: Actress Katharine McPhee arrives at the 2016 InStyle And Warner Bros. 73rd Annual Golden Globe Awards Post-Party at The Beverly Hilton Hotel on January 10, 2016 in Beverly Hills, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
HOLLYWOOD, CALIFORNIA - APRIL 07: Recording artist Katharine McPhee attends FOX's "American Idol" Finale For The Farewell Season at Dolby Theatre on April 7, 2016 in Hollywood, California. (Photo by Alberto E. Rodriguez/Getty Images)
LOS ANGELES, CA - JANUARY 31: Actress and singer Katharine McPhee arrives at the Tyler Ellis 5th Anniversary party and launch of the Tyler Ellis x Petra Flannery Collection at Chateau Marmont on January 31, 2017 in Los Angeles, California. (Photo by Amanda Edwards/WireImage)
LOS ANGELES - FEBRUARY 12: Katharine McPhee on the Red Carpet at THE 59TH ANNUAL GRAMMY AWARDS, broadcast live from the STAPLES Center in Los Angeles, Sunday, Feb. 12 (8:00-11:30 PM, live ET/5:00-8:30 PM, live PT; 6:00-9:30 PM, live MT) on the CBS Television Network. (Photo by Sonja Flemming/CBS via Getty Images)
LOS ANGELES, CA - FEBRUARY 14: Singer/actor Katharine McPhee performs onstage during "Stayin' Alive: A GRAMMY Salute To The Music Of The Bee Gees" on February 14, 2017 in Los Angeles, California. (Photo by Kevin Mazur/WireImage)
LOS ANGELES, CA - SEPTEMBER 19: Actress/singer Katharine McPhee attends the 2017 GRAMMY Museum Gala Honoring David Foster at The Novo by Microsoft on September 19, 2017 in Los Angeles, California. (Photo by Alison Buck/WireImage for The Recording Academy )
PACIFIC PALISADES, CA - OCTOBER 14: Katharine McPhee arrives at the 8th Annual Veuve Clicquot Polo Classic at Will Rogers State Historic Park on October 14, 2017 in Pacific Palisades, California. (Photo by Steve Granitz/WireImage)
BEVERLY HILLS, CA - NOVEMBER 09: Actress/singer Katharine McPhee arrives at SAG-AFTRA Foundation Patron of the Artists Awards 2017 on November 9, 2017 in Beverly Hills, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
48 LOUNGE, NEW YORK, UNITED STATES - 2018/05/24: Katharine McPhee wearing dress by Zimmermann attends Broadway.com Audience Choice Awards celebration at 48 Lounge. (Photo by Lev Radin/Pacific Press/LightRocket via Getty Images)
NEW YORK, NY - MAY 07: Katharine McPhee attends the Heavenly Bodies: Fashion & The Catholic Imagination Costume Institute Gala at The Metropolitan Museum of Art on May 7, 2018 in New York City. (Photo by Kevin Tachman/Getty Images for Vogue)
NEW YORK, NY - JUNE 10: Katharine McPhee attends the 72nd Annual Tony Awards on June 10, 2018 at Radio City Music Hall in New York City. (Photo by Walter McBride/WireImage)
VERONA, ITALY - SEPTEMBER 08: Katharine Mcphee attends Celebrity Fight Night at Arena di Verona on September 8, 2018 in Verona, Italy. (Photo by Daniele Venturelli/Getty Images)
US actress and singer Katharine McPhee attends the 2018 Princess Grace Awards Gala at Cipriani 25 Broadway on October 16, 2018 in New York City. (Photo by Angela Weiss / AFP) (Photo credit should read ANGELA WEISS/AFP/Getty Images)
LOS ANGELES, CA - DECEMBER 06: Katharine McPhee celebrates the new film "Mary, Queen of Scots" with Vanity Fair and Focus Features at Chateau Marmont on December 6, 2018 in Los Angeles, California. (Photo by Charley Gallay/Getty Images for Vanity Fair)
LONDON, ENGLAND - MARCH 07: Katharine McPhee attends the press night after party for "Waitress: The Musical" at Cafe At The Crypt, St Martin-in-the-Fields, on March 7, 2019 in London, England. (Photo by David M. Benett/Dave Benett/Getty Images)
LONDON, UNITED KINGDOM - 2019/04/07: Katharine McPhee seen on the red carpet during the Olivier awards at the Albert Hall in London. (Photo by Terry Scott/SOPA Images/LightRocket via Getty Images)
NEW YORK, NEW YORK - MAY 15:Singer Katharine McPhee attends the Breast Cancer Research Foundation's 2019 Hot Pink Party at Park Avenue Armory on May 15, 2019 in New York City. (Photo by Bennett Raglin/Getty Images for Breast Cancer Research Foundation)
BEVERLY HILLS, CALIFORNIA - MAY 19: Katharine McPhee attends the American Icon Awards at the Beverly Wilshire Four Seasons Hotel on May 19, 2019 in Beverly Hills, California. (Photo by Phillip Faraone/FilmMagic)
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