Lena Dunham and Jack Antonoff reportedly split after 5 years of dating

We've officially got one of our first celebrity uncouplings of 2018.

Bleachers singer-songwriter Jack Antonoff and Girls star Lena Dunham have called it quits, according to multiple reports. The pair had dated for five years.

ET has reached out to the exes' reps.

In November, things seemed good between the two, to the point where Dunham told followers on Twitter that she mistakenly thought her longtime significant other was about to propose.

13 PHOTOS
Lena Dunham & Jack Antonoff
See Gallery
Lena Dunham & Jack Antonoff
Lena Dunham from the HBO series "Girls" and Jack Antonoff arrive at the 66th Primetime Emmy Awards in Los Angeles, California August 25, 2014. REUTERS/Lucy Nicholson (UNITED STATES -Tags: ENTERTAINMENT)(EMMYS-ARRIVALS)
NEW YORK, NY - DECEMBER 01: (L-R) Lena Dunham and Jack Antonoff attend The Ally Coalition & Above Average's 2015 Talent Show at New World Stages on December 1, 2015 in New York City. (Photo by Rommel Demano/Getty Images)
LOS ANGELES, CA - OCTOBER 14: Lena Dunham and Jack Antonoff are seen at LAX on October 14, 2015 in Los Angeles, California. (Photo by GVK/Bauer-Griffin/GC Images)
BEVERLY HILLS, CA - OCTOBER 04: Actress Lena Dunham and musician Jack Antonoff arrive at The Rape Foundation's Annual Brunch at Greenacres, The Private Estate of Ron Burkle on October 4, 2015 in Beverly Hills, California. (Photo by Gregg DeGuire/WireImage)
LOS ANGELES, CA - AUGUST 28: Musician Jack Antonoff and Lena Dunham perform at AUDIBLE IMPACT: Music & Activism at on August 28, 2015 in Los Angeles, California. (Photo by Rebecca Sapp/WireImage)
NEW YORK, NY - MAY 28: Lena Dunham and Jack Antonoff seen on May 28, 2015 in New York City. (Photo by MPI67/Bauer-Griffin/GC Images)
BEVERLY HILLS, CA - JANUARY 11: (L-R) Actress Lena Dunham, musician Jack Antonoff, actress Jemima Kirke 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 and Jack Antonoff attend the 'Girls' season four series premiere after party at The Museum of Natural History on January 5, 2015 in New York City. (Photo by Jamie McCarthy/Getty Images)
NEW YORK, NY - JANUARY 31: Jack Antonoff, Lena Dunham and Natalie Maines attend 'Howard Stern's Birthday Bash' presented by SiriusXM, produced by Howard Stern Productions at Hammerstein Ballroom on January 31, 2014 in New York City. (Photo by Larry Busacca/Getty Images for SiriusXM)
REPEATING TO ADD NAME OF MAN IN PHOTO - Lena Dunham from the HBO series "Girls" and Jack Antonoff arrive at the 66th Primetime Emmy Awards in Los Angeles, California August 25, 2014. REUTERS/Lucy Nicholson (UNITED STATES -Tags: ENTERTAINMENT)(EMMYS-ARRIVALS)
LONDON, UNITED KINGDOM - JANUARY 15: Lena Dunham and Jack Antonoff attend the UK premiere of 'Girls: Season 3' at Cineworld Haymarket on January 15, 2014 in London, England. (Photo by Fred Duval/FilmMagic)
LOS ANGELES, CA - JANUARY 12: Actress/writer Lena Dunham (L) and musician Jack Antonoff with Moet & Chandon At The 71st Annual Golden Globe Awards at the Beverly Hilton Hotel on January 12, 2014 in Los Angeles, California. (Photo by Michael Kovac/Getty Images for Moet & Chandon)
BEVERLY HILLS, CA - JANUARY 13: Actress Lena Dunham (L) and musician Jack Antonoff attend HBO's Official Golden Globe Awards After Party held at Circa 55 Restaurant at The Beverly Hilton Hotel on January 13, 2013 in Beverly Hills, California. (Photo by Jeff Kravitz/FilmMagic)
HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

“I heard him say ‘Lena’ and ‘finger’ so obviously it seemed like an engagement ring talk,” she shared. "Now I literally can't sleep cuz I'm laughing too hard and I am also keeping him awake. 5.5 years, no rock and you know what? It's real nice."

It seems all that's left to decide is who gets Taylor Swift in the split.

RELATED CONTENT:

Why Lena Dunham Mistakenly Thought Jack Antonoff Was Going to Propose – Read the Hilarious Tweets!

Pregnant Mindy Kaling Enjoys Beach Day With Lena Dunham and Pals: See the Pics!

Look Back at the 12 Biggest Celebrity Breakups of 2017

Read Full Story

Sign up for Entertainment Insider by AOL to get the hottest pop culture news delivered straight to your inbox!

Subscribe to our other newsletters

Emails may offer personalized content or ads. Learn more. You may unsubscribe any time.