The 35-year-old daughter of Edwin Schlossberg and Caroline Kennedy died in December.

Jack Schlossberg says he’ll never process sister Tatiana’s death: ‘She was my best friend’

The 35-year-old daughter of Edwin Schlossberg and Caroline Kennedy died in December.

By Raechal Shewfelt

Raechal Shewfelt

Raechal Shewfelt is a writer at **. She has been working at EW since 2024. Her work has previously appeared on Yahoo and in American *Journalism Review* and *The Shreveport Times*.

EW's editorial guidelines

May 15, 2026 8:33 p.m. ET

Leave a Comment

Jack Schlossberg and his sister, Tatiana Schlossberg, in 2013. Credit:

- Kennedy heir Jack Schlossberg, the son of President John F. Kennedy's daughter Caroline, lost his older sister, Tatiana, in December.

- Tatiana Schlossberg, 35, died of cancer. The environmental journalist was a mother of two.

- Political candidate Jack Schlossberg said Tatiana was his best friend.

While Jack Schlossberg is focused on winning a seat in the U.S. House of Representatives, he can't stop thinking about his sister Tatiana's death.

"I don't think I'll ever process it," he told *Vanity Fair* in an interview published Friday. "The world will never be the same for me, not only since she passed away, but since she was diagnosed with cancer about two years ago."

Tatiana Schlossberg died Dec. 30, after announcing in November 2025 that she had been diagnosed with cancer, acute myeloid leukemia, more than a year earlier. Doctors told her the prognosis was terminal.

***Get your daily dose of entertainment news, celebrity updates, and what to watch with our EW Dispatch newsletter.***

"She was my best friend. We could finish each other's sentences," Schlossberg, 33, said of losing one of his two sisters. "I miss her all the time. Every day I think about her."

Schlossberg has said previously that his sister had told him he "better win" in his campaign.

His grief has served as a motivation.

"It's made me all the more motivated, engaged, and focused on making the most out of my life, and I think that there's no higher calling than public service," the grandson of President John F. Kennedy said. "To me, I think politics is a noble profession, and one that I would be fantastic at serving this district as. So she wanted me to win, and I intend to honor her by doing just that."

Candice Bergen recalls women 'clogging the doorways' to see JFK Jr. while filming his 'Murphy Brown' guest spot

Maria Shriver, siblings get candid about Kennedy family dynamics, political disagreements with RFK Jr.

The proximity of Schlossberg's loss has shown him, he said, that "it could have just as easily been me."

He feels an obligation to himself and his sister "to make the most out of my precious life and all that I’ve been given in this life to give back to others and make sure that we can fund cures for the type of cancer that took her life, and for other types of cancer."

Tatiana, Jack, Rose, Edwin, and Caroline Kennedy Schlossberg in 2013.

Clodagh Kilcoyne/Getty

During Tatiana's life, she worked as an environmental journalist at the *New York Times*. She published the non-fiction book* Inconspicuous Consumption: The Environmental Impact You Didn't Know You Had* in 2019.

The emotional essay in which she disclosed her illness was published in the *New Yorker*.

"Mostly, I try to live and be with them now," she wrote of her family, which included husband George Moran and their two children, Edwin and Josephine. "But being in the present is harder than it sounds, so I let the memories come and go. So many of them are from my childhood that I feel as if I'm watching myself and my kids grow up at the same time."

- Celebrities & Creators

- Celebrity Death Tributes

Original Article on Source

Source: “EW Celebrity”