Lena Dunham says this guy was Taylor Swift’s worst boyfriend (video)

Taylor Swift has dated several famous men in the past, but friend Lena Dunham says one guy was the worst of them all.

During her appearance on “Watch What Happens Live With Andy Cohen,” the actress played a game of Plead the Fifth when she received a question from her former “Girls” costar Andrew Rannells. She was asked to reveal her least favorite of Swift’s boyfriends — while sitting next to Maggie Gyllenhaal, the sister of one of Swift’s ex-boyfriends, Jake Gyllenhaal.

“Choose your gentleman carefully,” Cohen warned.

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Lena Dunham through the years
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Lena Dunham through the years
NEW YORK, NY - FEBRUARY 01: Actress Lena Dunham attends TimesTalks: A Final Farewell to the Cast of HBO's 'Girls' at Jack H. Skirball Center for the Performing Arts on February 1, 2017 in New York City. (Photo by Ben Gabbe/Getty Images)
NEW YORK, NY - FEBRUARY 02: Actress Lena Dunham attends the the New York premiere of the sixth and final season of 'Girls' at Alice Tully Hall, Lincoln Center on February 2, 2017 in New York City. (Photo by Steve Zak Photography/FilmMagic)
NEW YORK, NY - FEBRUARY 02: (L-R) Actresses Allison Williams, Zosia Mamet, Lena Dunham and Jemima Kirke attend the the New York premiere of the sixth and final season of 'Girls' at Alice Tully Hall, Lincoln Center on February 2, 2017 in New York City. (Photo by Jim Spellman/WireImage)
NEW YORK, NY - DECEMBER 07: Actress Lena Dunham is seen on December 7, 2016 in New York City. (Photo by Raymond Hall/GC Images)
LOS ANGELES, CA - NOVEMBER 14: Actress Lena Dunham arrives at Glamour Women of the Year 2016 at NeueHouse Hollywood on November 14, 2016 in Los Angeles, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
NEW YORK, NY - NOVEMBER 07: Lena Dunham leaves Lourde's birthday party at ZZ� Clam Bar on November 7, 2016 in New York City. (Photo by James Devaney/GC Images)
LOS ANGELES, CA - NOVEMBER 14: Actress Lena Dunham poses backstage during Glamour Women Of The Year 2016 LIVE Summit at NeueHouse Hollywood on November 14, 2016 in Los Angeles, California. (Photo by Emma McIntyre/Getty Images)
NEW YORK, NY - NOVEMBER 01: Honoree Laurie Simmons, daughter Lena Dunham and Tip Dunham attend ICP's luncheon honoring Laurie Simmons on November 1, 2016 in New York City. (Photo by Nicholas Hunt/Getty Images for ICP)
NEW YORK, NY - OCTOBER 27: Jennifer Konner and Lena Dunham attend 12th Annual New York Television Festival - Creative Keynote: A Conversation with 'Girls' at SVA Theater on October 27, 2016 in New York City. (Photo by Laura Cavanaugh/FilmMagic)
NEW YORK, NY - OCTOBER 25: Jenni Konner, Lena Dunham, and Jessica Grose attend Hearst MagFront 2016 at Hearst Tower on October 25, 2016 in New York City. (Photo by Ben Gabbe/Getty Images for Hearst)
NEW YORK, NY - OCTOBER 25: Lena Dunham (L) and Abbi Jacobson pose onstage before discussing Abbi Jacobson's book 'Carry This Book' at Symphony Space on October 25, 2016 in New York City. (Photo by D Dipasupil/Getty Images)
LATE NIGHT WITH SETH MEYERS -- Episode 0434 -- Pictured: (l-r) Actress Lena Dunham during an interview on October 11, 2016 -- (Photo by: Lloyd Bishop/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - OCTOBER 24: Actress Lena Dunham is seen walking in Soho on October 24, 2016 in New York City. (Photo by Raymond Hall/GC Images)
NEW YORK, NY - FEBRUARY 02: Lena Dunham discusses Let Girls Learn at The American Magazine Media Conference at Grand Hyatt New York on February 2, 2016 in New York City. (Photo by Gary Gershoff/WireImage)
PARK CITY, UT - JANUARY 24: Actress Lena Dunham speaks from the podium at the Lena Dunham and Planned Parenthood Host Sex, Politics & Film Cocktail Reception at The Spur on January 24, 2016 in Park City, Utah. (Photo by Nicholas Hunt/Getty Images)
NEW YORK, NY - APRIL 24: Honoree Lena Dunham speaks onstage at Variety's Power of Women New York presented by Lifetime at Cipriani 42nd Street on April 24, 2015 in New York City. (Photo by Brian Ach/Getty Images for Variety)
WEST HOLLYWOOD, CA - JANUARY 13: Actress Lena Dunham attends ELLE's Annual Women in Television Celebration on January 13, 2015 at Sunset Tower in West Hollywood, California. Presented by Hearts on Fire and Olay. (Photo by Michael Buckner/Getty Images for ELLE)
BEVERLY HILLS, CA - JANUARY 11: Actress Lena Dunham attends HBO's post Golden Globe Awards party at The Beverly Hilton Hotel on January 11, 2015 in Beverly Hills, California. (Photo by Jason LaVeris/FilmMagic)
BEVERLY HILLS, CA - JANUARY 11: Actress/director Lena Dunham (L) and singer/songwriter Taylor Swift attend HBO's Official Golden Globe Awards After Party at The Beverly Hilton Hotel on January 11, 2015 in Beverly Hills, California. (Photo by Jeff Kravitz/FilmMagic)
NEW YORK, NY - JANUARY 05: Lena Dunham attends the 'Girls' season four premiere at American Museum of Natural History on January 5, 2015 in New York City. (Photo by Kevin Mazur/WireImage)
NEW YORK, NY - DECEMBER 02: Actress/Author Lena Dunham reads from her book, 'Not That Kind of Girl' during the 2014 Ally Coalition's Talent Show at New World Stages on December 2, 2014 in New York City. (Photo by Mike Pont/Getty Images)
BEVERLY HILLS, CA - NOVEMBER 11: Actress / Director Lena Dunham attends Pen Center USA's 24th Annual Literary Awards Festival at the Beverly Wilshire Four Seasons Hotel on November 11, 2014 in Beverly Hills, California. (Photo by Paul Archuleta/FilmMagic)
LONDON, ENGLAND - OCTOBER 29: Lena Dunham meets fans and signs copies of her book 'Not That Kind Of Girl' at Waterstones, Piccadilly on October 29, 2014 in London, England. (Photo by Stuart C. Wilson/Getty Images)
LOS ANGELES, CA - OCTOBER 14: Actress Lena Dunham signs copies of 'Not That Kind Of Girl: A Young Woman Tells You What She's 'Learned.' at Barnes & Noble bookstore at The Grove on October 14, 2014 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
NEW YORK, NY - SEPTEMBER 30: Television personality Robin Roberts (L) and actress Lena Dunham tape an interview at 'Good Morning America' at the ABC Times Square Studios on September 30, 2014 in New York City. (Photo by Ray Tamarra/GC Images)
LOS ANGELES, CA - AUGUST 25: Actress Lena Dunham arrives at the 66th Annual Primetime Emmy Awards at Nokia Theatre L.A. Live on August 25, 2014 in Los Angeles, California. (Photo by Jon Kopaloff/FilmMagic)
WEST HOLLYWOOD, CA - AUGUST 23: Actress Lena Dunham attends Variety and Women in Film Emmy Nominee Celebration powered by Samsung Galaxy on August 23, 2014 in West Hollywood, California. (Photo by Alberto E. Rodriguez/Getty Images for Variety)
NEW YORK, NY - MAY 05: [EDITOR'S NOTE: Image has been digitally processed] Lena Dunham attends the 'Charles James: Beyond Fashion' Costume Institute Gala at the Metropolitan Museum of Art on May 5, 2014 in New York City. (Photo by Andrew H. Walker/Getty Images)
NEW YORK, NY - APRIL 23: Director Lena Dunham on the set of 'Girls' on April 23, 2014 in New York City. (Photo by Bobby Bank/GC Images)
NEW YORK, NY - MAY 01: Lena Dunham filming 'Girls' on May 1, 2014 in New York City. (Photo by Steve Sands/GC Images)
NEW YORK, NY - APRIL 07: Lena Dunham attends the 2014 Point Honors New York gala at New York Public Library on April 7, 2014 in New York City. (Photo by Nomi Ellenson/FilmMagic)
NEW YORK, NY - MARCH 18: Lena Dunham visits 'The Tonight Show Starring Jimmy Fallon' at Rockefeller Center on March 18, 2014 in New York City. (Photo by Theo Wargo/NBC/Getty Images for 'The Tonight Show Starring Jimmy Fallon')
NEW YORK, NY - MARCH 27: Actress Lena Dunham attends the Fox Searchlight Pictures' 'Dom Hemingway' screening hosted by The Cinema Society And Links Of London on March 27, 2014 in New York City. (Photo by Jim Spellman/WireImage)
NORTH HOLLYWOOD, CA - MARCH 13: Actress Lena Dunham attends an evening with 'Girls' at Leonard H. Goldenson Theatre on March 13, 2014 in North Hollywood, California. (Photo by Jason LaVeris/FilmMagic)
BEVERLY HILLS, CA - JANUARY 13: Writer/director Lena Dunham poses with Best Actress in a TV Comedy Award in the press room during the 70th Annual Golden Globe Awards held at The Beverly Hilton Hotel on January 13, 2013 in Beverly Hills, California. (Photo by Kevin Winter/Getty Images)
NEW YORK, NY - JANUARY 09: Lena Dunham attends the premiere of 'Girls' season 2 hosted by HBO at NYU Skirball Center on January 9, 2013 in New York City. (Photo by Andrew H. Walker/Getty Images)
Cast member Lena Dunham arrives at the premiere of Universal's 'This Is 40,' December 12, 2012 at Grauman's Chinese Theatre in Hollywood, California. AFP PHOTO / ROBYN BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)
AUSTIN, TX - MARCH 12: Writer/Director/Actress Lena Dunham attends 'Girls' Greenroom Photo Op during the 2012 SXSW Music, Film + Interactive Festival at Paramount Theatre on March 12, 2012 in Austin, Texas. (Photo by Michael Buckner/Getty Images for SXSW)
SANTA MONICA, CA - FEBRUARY 26: Actress/filmmaker Lena Dunham, winner of Best First Screenplay for 'Tiny Furniture,' accepts award onstage during the 2011 Film Independent Spirit Awards at Santa Monica Beach on February 26, 2011 in Santa Monica, California. (Photo by Kevork Djansezian/Getty Images)
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“I want to do right by her on this question — and I’m also proud, because I haven’t pled the fifth on any of these and I think that makes me some kind of champion!” Dunham said. “My least favorite was Calvin Harris, because I felt he was petty in the public and who needs to do that?”

A representative for Harris has not yet responded to TheWrap’s request for comment. Swift dated the Scottish DJ from March 2015 to around June 2016.

“That was really amazing. I mean, I’m always proud of Taylor,” she said. “Not only is she an amazing friend to me on a personal level, but she’s an amazing friend to lots of people in the world. She felt it was time for her to talk about politics — and I never judged her for considering that a private domain — but I think she chose a really, really powerful time to speak out. I’m so moved and honored to be her friend.”

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Taylor Swift through the years
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Taylor Swift through the years
Taylor Swift (Photo by Frank Mullen/WireImage)
LAS VEGAS - MAY 23: Country singer Taylor Swift arrives at the 41st Annual Academy Of Country Music Awards held at the MGM Grand Garden Arena on May 23, 2006 in Las Vegas, Nevada. (Photo by Michael Buckner/Getty Images)
Taylor Swift accepts Breathrough Video of the Year award for 'Tim McGraw' (Photo by Kevin Mazur/WireImage)
LAS VEGAS - MAY 14: Music artist Taylor Swift performs during the Academy of Country Music New Artists' Party for a Cause show at the MGM Grand Conference Center May 14, 2007 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)
NASHVILLE, TN - NOVEMBER 07: (LtoR) Singer/songwriters Taylor Swift, Brad Paisley and Kellie Pickler perform on stage at the 41st Annual CMA Awards at the Sommet Center on November 7, 2007 in Nashville TN. (Photo by Rick Diamond/WireImage)
�2009 RAMEY PHOTO LOS ANGELES, 7/30/09 TAYLOR SWIFT, TAYLOR LAUTNER, EMMA ROBERTS AND HER BOYFRIEND, FILMING VALENTINE'S DAY' IN LA. GV (Photo by Philip Ramey/Corbis via Getty Images)
CHELMSFORD, UNITED KINGDOM - AUGUST 22: Taylor Swift performs on the main stage on day 1 of the V Festival on August 22, 2009 at Hylands Park in Chelmsford, England. (Photo by Samir Hussein/Getty Images)
LAS VEGAS, NV - APRIL 03: Singer\songwriter Taylor Swift arrives at the 46th Annual Academy Of Country Music Awards RAM Red Carpet held at the MGM Grand Garden Arena on April 3, 2011 in Las Vegas, Nevada. (Photo by Christopher Polk/ACMA2011/Getty Images for ACM)
FRANKFURT AM MAIN, GERMANY - NOVEMBER 11: Taylor Swift performs onstage during the MTV EMA's 2012 at Festhalle Frankfurt on November 11, 2012 in Frankfurt am Main, Germany. (Photo by Andreas Rentz/Getty Images for MTV)
LOS ANGELES, CA - FEBRUARY 10: Taylor Swift attends The 55th Annual GRAMMY Awards - press room held at Staples Center on February 10, 2013 in Los Angeles, California. (Photo by Michael Tran/FilmMagic)
NASHVILLE, TN - OCTOBER 12: Singer Taylor Swift officially opens the Taylor Swift Education Center at the Country Music Hall of Fame and Museum on October 12, 2013 in Nashville, Tennessee. Seven-time GRAMMY winner Swift's $4 million gift to endow the center is the largest individual artist gift in the Hall of Fame's history. (Photo by Royce DeGrie/TAS/Getty Images for TAS)
NEW YORK, NY - APRIL 12: Taylor Swift is seen on April 12, 2014 in New York City. (Photo by David Krieger/Bauer-Griffin/GC Images)
NEW YORK - OCTOBER 28: Taylor Swift performs on the Late Show With David Letterman, October 28, 2014. (Photo by John Paul Filo/CBS via Getty Images)
NEW YORK, NY - DECEMBER 31: Taylor Swift performs onstage during Dick Clark's New Year's Rockin' Eve with Ryan Seacrest 2015 on December 31, 2014 in New York City. (Photo by Mike Coppola/DCNYRE2015/Getty Images for dcp)
LAS VEGAS, NV - MAY 17: Musician Taylor Swift poses in the press room with her eight Billboard Music Awards; Swift won Top Artist, Top Female Artist, Top Billboard 200 Artist, Top Billboard 200 Album for '1989,' Top Hot 100 Artist, Top Digital Songs Artist, Top Streaming Song (Video) for 'Shake It Off,' and Billboard Chart Achievement Award during the 2015 Billboard Music Awards at MGM Grand Garden Arena on May 17, 2015 in Las Vegas, Nevada. (Photo by Jason Merritt/Getty Images)
SHANGHAI, CHINA - NOVEMBER 10: Taylor Swift performs on stage during 'The 1989 World Tour' at the Mercedes-Benz arena on November 10, 2015 in Shanghai, China. PHOTOGRAPH BY Feature China / Barcroft Media UK Office, London. T +44 845 370 2233 W www.barcroftmedia.com USA Office, New York City. T +1 212 796 2458 W www.barcroftusa.com Indian Office, Delhi. T +91 11 4053 2429 W www.barcroftindia.com (Photo credit should read Feature China / Barcroft Media / Barcroft Media via Getty Images)
INGLEWOOD, CALIFORNIA - APRIL 03: Taylor Swift arrives at the iHeartRadio Music Awards on April 3, 2016 in Inglewood, California. (Photo by Steve Granitz/WireImage)
HOUSTON, TX - FEBRUARY 04: Musician Taylor Swift performs onstage during the 2017 DIRECTV NOW Super Saturday Night Concert at Club Nomadic on February 4, 2017 in Houston, Texas. (Photo by Larry Busacca/Getty Images for DIRECTV)
2018 Billboard Music Awards ? Photo Room ? Las Vegas, Nevada, U.S., 20/05/2018 ? Taylor Swift holds her awards for Top Female Artist and Top Selling Album. REUTERS/Steve Marcus
Singer Taylor Swift performs during her reputation stadium tour at Wembley Stadium in London, Britain June 22, 2018. REUTERS/Simon Dawson
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