Caroline Kennedy, ambassador of the United States to Australia, left, arrives with her husband, Edwin Schlossberg, center left, and her children, Tatiana Schlossberg, center right, and Jack Schlossberg, right, Oct. 29, 2023, before the presentation ceremony for the John F. Kennedy Profile in Courage Award at the John F. Kennedy Presidential Library and Museum, in Boston. (AP Photo/Steven Senne, file)

Environmental journalist Tatiana Schlossberg, one of three grandchildren of the late President John F. Kennedy, has died after she was diagnosed with leukemia last year. She was 35.

Schlossberg, daughter of Kennedy’s daughter, Caroline Kennedy, and Edwin Schlossberg, revealed she had terminal cancer in a November 2025 essay in The New Yorker. A family statement disclosing her death was posted on social media Tuesday by the John F. Kennedy Library Foundation.

“Our beautiful Tatiana passed away this morning. She will always be in our hearts,” the statement said. It did not disclose a cause of death or say where she had died.

Schlossberg told of being diagnosed with acute myeloid leukemia in May 2024 at 34. While in the hospital for the birth of her second child, her doctor noticed her white blood cell count was high. It turned out to be acute myeloid leukemia with a rare mutation, mostly seen in older people.

In the essay, “A Battle With My Blood,” Schlossberg recounted going through rounds of chemotherapy and two stem cell transplants and participating in clinical trials. During the most recent trial, she wrote, her doctor told her “he could keep me alive for a year, maybe.”

Schlossberg also criticized policies pushed by her mother’s cousin, Health and Human Services Secretary Robert F. Kennedy Jr., in the essay, saying policies he backed could hurt cancer patients like her. Her mother had urged senators to reject his confirmation.

“As I spent more and more of my life under the care of doctors, nurses, and researchers striving to improve the lives of others, I watched as Bobby cut nearly a half billion dollars for research into mRNA vaccines, technology that could be used against certain cancers,” the essay reads.

Schlossberg had worked as a reporter covering climate change and the environment for The New York Times’ Science section. Her 2019 book “Inconspicuous Consumption: The Environmental Impact You Don’t Know You Have” won the Society of Environmental Journalists’ Rachel Carson Environment Book Award in 2020.