David Foster's daughters Erin, Sara react to his engagement to Katharine McPhee

Does this mean they’re happy for them? David Foster‘s daughters, Erin and Sara Foster, reacted to news of his engagement to Katharine McPhee, posting funny comments on the music producer’s Instagram account.

Barely Famous star Erin, 35, commented on a pic of her dad, 68, and his future wife, on Tuesday, July 3, calling the American Idol alum, 34, “Mommmyyy.”

Meanwhile, 90210 alum Sara, 37, teased the newly engaged couple by writing, “Out of the country. What did I miss?”

As Us Weekly previously reported, the couple announced their engagement on Tuesday, after a year of dating.

Sara told Us back in December 2017 that she and her siblings were happy about their father’s relationship with the singer.

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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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“We approve of whoever is going to be good to my dad; at the end of the day and we’re very honest about it,” Sara told Us. “If we ever thought that anyone was in something for the wrong reasons, we would be very vocal about it. We just want someone that’s going to treat him well and that cares about him, and I think he’s with someone right now that really does.”

Erin joked about her dad’s new relationship in September, posting a photo of the new couple of Snapchat, with the caption, “Excited about my new step mom,” and writing “My parents” on a video of the Scorpion actress performing while accompanied on the piano by David.

McPhee met the Grammy-winning producer in 2006 when he mentored her on American Idol. Two years later he played the piano at her wedding to Nick Cokas. The singer and her husband split in 2016.

The Smash alum’s new fiancé has been married four times, with his most recent marriage to Real Housewives of Beverly Hills alum Yolanda Hadidending in 2015 after four years.

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