Tatiana Schlossberg, a dedicated environmental journalist and granddaughter of former President John F. Kennedy, has sadly passed away at 35, her family has confirmed.

“Our beloved Tatiana left us this morning. She will forever hold a place in our hearts,” the family expressed in a statement shared on the JFK Library Foundation’s Instagram on Tuesday.

Raised in New York City, Schlossberg was the daughter of Caroline Kennedy and granddaughter to Jacqueline Kennedy Onassis and JFK.

Tatiana Schlossberg succumbed to cancer at the age of 35. (Craig Barritt/Getty Images for New York Magazine)

Schlossberg forged a path as an influential voice for climate and environmental advocacy, holding a history degree from Yale University and a master’s in American history from the University of Oxford.

In 2024, Schlossberg was diagnosed with acute myeloid leukemia and shared her experience publicly in a personal essay for The New Yorker in November 2025.

“My parents and my brother and sister, too, have been raising my children and sitting in my various hospital rooms almost every day for the last year and a half,” she wrote at the time.

Schlossberg also explained how doctors discovered her disease while she was hospitalized after giving birth to her second child, a daughter.

She explained in her essay how doctors spotted that her white-blood-cell count “looked strange.”

Britain’s Prince William, Prince of Wales, tours the John F. Kennedy Presidential Library and Museum with U.S. Ambassador to Australia, Caroline Kennedy, Jack Kennedy Schlossberg and Tatiana Kennedy Schlossberg in Boston, Dec. 2, 2022. (Matt Stone/Pool/AFP via Getty Images)

She and her husband, George Moran, who she had married in 2017, also had a son.

After hearing from a doctor that she had “a year, maybe” to live, Schlossberg told how her first thought was that “my kids, whose faces live permanently on the inside of my eyelids, wouldn’t remember me.”

In her essay she also predicted that her son “might have a few memories, but he’ll probably start confusing them with pictures he sees or stories he hears.”

At the time, Schlossberg said she had experienced a postpartum hemorrhage that nearly claimed her life. 

Caroline Kennedy’s children, Jack and Tatiana Schlossberg, listen as their mother goes before the U.S. Senate Foreign Relations Committee for questioning during her nomination as U.S. ambassador to Japan in 2013. (ImageCatcher News Service/Corbis via Getty Images)

Schlossberg’s family history has been marked by loss.

Caroline Kennedy was five days away from her sixth birthday when her father, President John F. Kennedy, was assassinated in Dallas, Texas. 

Her mother was Jacqueline Kennedy. Decades later, Caroline also lost her only living sibling, John F. Kennedy Jr., in a plane crash in 1999.

Before her diagnosis, Shlossberg had been planning a research project focused on ocean conservation.

This is a developing story. Please check back for updates.