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Lena Dunham admits to cheating on ex Jack Antonoff after he began ‘spending time with teen pop star’

Home> Entertainment> Celebrity

Published 13:00 15 Apr 2026 GMT+1

Lena Dunham admits to cheating on ex Jack Antonoff after he began ‘spending time with teen pop star’

She has opened up on her six-year relationship with Jack Antonoff in her new memoir, Famesick

Madison Burgess

Madison Burgess

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Featured Image Credit: Michael Kovac/Getty Images for Moet & Chandon

Topics: Celebrity, Entertainment, Books, Sex and Relationships

Madison Burgess
Madison Burgess

Madison is a Journalist at Tyla with a keen interest in lifestyle, entertainment and culture. She graduated from the University of Sheffield with a first-class degree in Journalism Studies, and has previously written for DMG Media as a Showbiz Reporter and Audience Writer.

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Lena Dunham's latest memoir, Famesick, has officially been released this week - and it looks like she's not holding back.

The 39-year-old creator of the fan-favourite HBO TV show, Girls, who found herself embroiled in controversy following the release of her first book, is back with another tell-all account of her life.

Described as a 'rowdy, frank reflection on illness, fame, sex, and everything in between', the memoir also spills the tea on her former relationship with Jack Antonoff.

Dunham dated the American music producer, who's worked with huge stars like Taylor Swift, Lana Del Rey, and Lorde, for six years between 2012 and 2018.

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Now, she's admitted in her new book that she cheated on him with a middle school flame called Nick while Antonoff was allegedly getting close to 'a teen pop star'.

The actress detailed how things went downhill after she underwent a hysterectomy in November 2017, resulting in the couple having their ‘worst ever fight’, leading to a pause on their relationship.

Lena Dunham and Jack Antonoff were in a relationship for six years (Jeff Kravitz/FilmMagic)
Lena Dunham and Jack Antonoff were in a relationship for six years (Jeff Kravitz/FilmMagic)

While she was on tour during the break, she reconnected with her ex, Nick.

As per MailOnline, Dunham wrote in her memoir: "Up until now, I had seen myself as some kind of half wife, and so I had observed wifely code (you can masturbate thinking about someone oxidizing metal, but you can’t touch!)"

“But the events of the past few weeks had changed the game, and it was every woman for herself, just trying to survive."

She detailed how, after keeping in touch with him via email for years, she went on a date with her former flame and went back to his apartment.

Dunham claimed she told Nick: “I’ve been through something awful. I don’t want to talk about it, but I need you to f**k me, and I need you to do all the work.”

Antonoff is now married to actress Margaret Qualley (Francis Specker/CBS via Getty Images)
Antonoff is now married to actress Margaret Qualley (Francis Specker/CBS via Getty Images)

She admitted that they slept together for two weeks while Antonoff - who is now married to The Substance star Margaret Qualley - was on tour.

The writer also issued cryptic remarks about Antonoff spending time in the studio with a 'teen pop star', alleging that she was 'weeping into Jack's lap' when she came home one day.

Dunham said that while she flirted with others during their six-year relationship, she 'observed careful boundaries, never taking it far enough that I could be declared out of bounds.'

She wrote: "If I’d wanted to look, perhaps I may have seen that Jack was not observing them as closely as I was. I wasn’t paying attention, but the internet sure was, and they made some pretty amazing PowerPoints on the issue, so convincing they had me rethinking events that I myself had been present for."

The Independent reports that Dunham was referring to the public speculation about Antonoff and musician Lorde.

Dunham admitted she cheated on Antonoff with a middle school ex called Nick (Aeon/Getty Images)
Dunham admitted she cheated on Antonoff with a middle school ex called Nick (Aeon/Getty Images)

Despite both parties firmly denying the rumours at the time, one fan who wasn't having it made a whole PowerPoint to make their case, which Dunham is thought to be referring to.

Speaking to The Cut in 2018 about the person behind the strange presentation, she joked: "Actually, I completely respect this girl, because she did a very good job and she was very funny.

"It was awful because I felt like a weird... I don't think anything happened between them. I can never know someone else's life. I have never spoken to Ella [Lorde] about it.

"We haven't talked since Jack, and I broke up. It was awful, and I couldn't do anything about it except trust that what he was saying to me was true."

Tyla has contacted reps for Antonoff and Lorde for comment.

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