Tatiana Schlossberg has died just one month after she announced her battle with acute myeloid leukemia. She was 35.

“Our beautiful Tatiana passed away this morning,” the JFK Library Foundation, on behalf of Schlossberg’s extended family, announced Tuesday via Instagram. “She will always be in our hearts.”

The message was signed by her family, “George, Edwin and Josephine Moran Ed, Caroline, Jack, Rose and Rory.”

Caroline Kennedy’s daughter, Tatiana Schlossberg, has died after battling leukemia, her family announced Tuesday. Getty Images for New York Magazine

“Our beautiful Tatiana passed away this morning,” the statement read. “She will always be in our hearts.” Penske Media via Getty Images

Schlossberg announced she was diagnosed with acute myeloid leukemia in November. Getty Images for goop

Schlossberg — who shared her diagnosis in an essay for the New Yorker, published in November — was initially diagnosed in May 2024 and had been given just a year to live.

As for her treatment options, Schlossberg said she “could not be cured by a standard course.”

“I did not — could not — believe that they were talking about me,” she recalled in her essay.

“I had swum a mile in the pool the day before, nine months pregnant. I wasn’t sick. I didn’t feel sick. I was actually one of the healthiest people I knew.”

She revealed she was diagnosed in May 2024 after giving birth to her daughter. WireImage

Doctors told her she only had a year to live. Getty Images

“I had a son whom I loved more than anything and a newborn I needed to take care of,” Schlossberg, who shared a 3-year-old son and 1-year-old daughter with her husband, George Moran, added.

She also shared how her husband — whom she married in September 2017 — supported her through her health battle.

“George did everything for me that he possibly could,” she noted. “He talked to all the doctors and insurance people that I didn’t want to talk to; he slept on the floor of the hospital.”

She was the youngest daughter of Kennedy and Edwin Schlossberg. CJ GUNTHER/EPA-EFE / Shutterstock

Kennedy and Edwin also share daughter Rose, 37, and son Jack, 32. Getty Images

Tatiana’s brother, Jack Schlossberg, reacted to her devastating essay on Instagram the following day.

“Life is short — let it rip,” Jack, 32, wrote atop a photo of a concrete road and another of a blue sky.

Tatiana’s cousin Maria Shriver also shared her support for her, writing via Instagram, “Tatiana is a beautiful writer, journalist, wife, mother, daughter, sister, and friend. This piece is about what she has been going through for the last year and a half.

“It’s an ode to all the doctors and nurses who toil on the frontlines of humanity. It’s so many things, but best to read it yourself, and be blown away by one woman’s life story.”

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