Tatiana Schlossberg addresses the audience during the John F. Kennedy Profile in Courage Award ceremony, October 29, 2023, at the John F. Kennedy Presidential Library and Museum, in Boston. STEVEN SENNE / AP

American environmental journalist Tatiana Schlossberg, the granddaughter of late president John F. Kennedy, has died from cancer at the age of 35, her family announced Tuesday, December 30. "Our beautiful Tatiana passed away this morning. She will always be in our hearts," the family wrote in a statement posted on the JFK Library Foundation's Instagram account.

Schlossberg, a science and climate reporter for The New York Times, wrote movingly about her diagnosis with acute myeloid leukemia in an essay for The New Yorker published in November. Doctors were first alerted to the condition – mostly seen in older patients and among first responders to the 9/11 attacks in New York – after detecting an unusually high white blood cell count following the birth of her second child in May 2024.

"During the latest clinical trial, my doctor told me that he could keep me alive for a year, maybe," she wrote. "My first thought was that my kids, whose faces live permanently on the inside of my eyelids, wouldn't remember me."