Lena Dunham's stunning claims about ex Jack Antonoff in memoir before alleged Margaret Qualley split

Lena Dunham and Jack Antonoff had been romantically involved from 2012 until late 2017
Lena Dunham opened up about her relationship with ex-boyfriend Jack Antonoff in her memoir 'Famesick', which was released just months before his apparent split from his wife, Margaret Qualley (Getty Images)
Lena Dunham opened up about her relationship with ex-boyfriend Jack Antonoff in her memoir 'Famesick', which was released just months before his apparent split from his wife, Margaret Qualley (Getty Images)

LOS ANGELES, CALIFORNIA: Lena Dunham made some shocking remarks about her former beau Jack Antonoff in her 2026 memoir months before his alleged split from his wife, Margaret Qualley.

She accused the music producer of spending a lot of time with an unnamed “teen pop star” in her book, ‘Famesick’, which was released in April. They had been romantically involved from 2012 until late 2017.

Lena Dunham opens up about ex Jack Antonoff spending time with a teen pop star

In her book, Dunham reportedly shared one incident when she was still with Antonoff.

Actor-producer Lena Dunham (L) and recording artist Jack Antonoff attend Pre-GRAMMY Gala and Salute to Industry Icons Honoring Debra Lee on February 11, 2017 in Los Angeles, California. (Photo by Michael Kovac/WireImage)
Lena Dunham and recording artist Jack Antonoff attend Pre-GRAMMY Gala and Salute to Industry Icons Honoring Debra Lee on February 11, 2017, in Los Angeles, California (Michael Kovac/WireImage)

She reportedly wrote that she once FaceTimed the Grammy-winning music producer, 42, while visiting her grandmother and found him in “the recording studio in our apartment, where he was ensconced with a teen pop star I was too oblivious to be jealous of.”

The 40-year-old actress-director also reportedly claimed in her memoir that Antonoff spent his time with the teen pop star, who even called her ‘Aunt Lena’ "when I hobbled into the kitchen with my walker to grab another bottle of green tea."

Lena Dunham accuses ex Jack Antonoff of being emotionally unavailable

Mentioning another incident, Dunham reportedly stated in her book that once she returned home after a doctor’s appointment, she found the young woman "weeping into Jack’s lap" while he was consoling her and telling her that "your teens are for experimenting," as per Page Six

As per the 'Girls' creator, Antonoff's comforting tone "almost brought tears to my eyes.”

Actress Lena Dunham and musician Jack Antonoff attend the the New York premiere of the sixth and final season of
Lena Dunham and Jack Antonoff attend 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 (Jim Spellman/WireImage)

“It had been so long since he’d spoken to me with that kind of expansive generosity,” she reportedly claimed in the book.

Jack Antonoff and Margaret Qualley allegedly faced 'communication challenge' in marriage

Margaret Qualley(L) and Jack Antonoff attend the 68th GRAMMY Awards at Crypto.com Arena on February 01, 2026 in Los Angeles, California. (Photo by Matt Winkelmeyer/Getty Images for The Recording Academy)
Margaret Qualley and Jack Antonoff attend the 68th GRAMMY Awards at Crypto.com Arena on February 1, 2026 in Los Angeles, California. (Matt Winkelmeyer/Getty Images for The Recording Academy)

Meanwhile, several outlets reported on Wednesday, July 8, that Antonoff and Qualley, 31, had separated just months before their third wedding anniversary. They had tied the knot in August 2023.

A tipster spilled to Page Six that “Jack could be very particular about how he liked things. He’d often prefer for things to be done the way he thought was best, and Margaret didn’t always feel like her perspective was being heard or given the same weight. Communication was definitely a challenge between him and Margaret.”

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