Environmental journalist Tatiana Schlossberg, granddaughter of President John F. Kennedy, has died at age 35 following a battle with leukemia. Her family announced her passing in a statement posted by the John F. Kennedy Library Foundation on Tuesday.

“Our beautiful Tatiana passed away this morning. She will always be in our hearts,” the brief statement read, without specifying the cause or location of her death.

Schlossberg, the daughter of Caroline Kennedy and Edwin Schlossberg, had publicly revealed her terminal cancer diagnosis in a poignant essay published in The New Yorker in November 2025. The piece, titled “A Battle With My Blood,” chronicled her medical journey that began unexpectedly in May 2024, when doctors noted an elevated white blood cell count while she was in the hospital for the birth of her second child.

The diagnosis was acute myeloid leukemia with a rare mutation typically seen in older patients. In her essay, Schlossberg detailed her extensive treatments, including multiple rounds of chemotherapy, two stem cell transplants, and participation in clinical trials. Despite these efforts, her doctor had ultimately told her “he could keep me alive for a year, maybe.”

Schlossberg had established herself as a respected environmental journalist before her illness. She worked for The New York Times’ Science section, covering climate change and environmental issues. Her 2019 book, “Inconspicuous Consumption: The Environmental Impact You Don’t Know You Have,” earned the Rachel Carson Environment Book Award from the Society of Environmental Journalists in 2020, cementing her reputation as a thoughtful voice in environmental reporting.

In her New Yorker essay, Schlossberg also addressed political differences within the Kennedy family, specifically criticizing policies promoted by her mother’s cousin, Health and Human Services Secretary Robert F. Kennedy Jr. She expressed concern that his positions could harm cancer patients like herself, noting, “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.” Her mother, Caroline Kennedy, had previously urged senators to reject his confirmation.

The essay also revealed Schlossberg’s deeply personal fears and reflections. She expressed heartbreak that her young daughter and son might not remember her and grief over the life she would miss with her husband, George Moran. “For my whole life, I have tried to be good, to be a good student and a good sister and a good daughter, and to protect my mother and never make her upset or angry,” she wrote. “Now I have added a new tragedy to her life, to our family’s life, and there’s nothing I can do to stop it.”

Schlossberg’s death adds another chapter to the Kennedy family’s well-documented history of tragedy. Her mother Caroline was just five years old when President Kennedy was assassinated in Dallas in 1963, and ten when her uncle Robert F. Kennedy was killed while campaigning for president in 1968. In 1999, Caroline’s brother John F. Kennedy Jr. died when the plane he was piloting crashed into the Atlantic Ocean near Martha’s Vineyard, also killing his wife Carolyn and her sister Lauren Bessette.

Tatiana is survived by her husband, two children, parents, and siblings Rose and Jack Schlossberg, who along with Tatiana represented the only grandchildren of the late president.

Her passing has prompted an outpouring of condolences from environmental advocates, journalists, and those touched by her candid writing about facing terminal illness at a young age. Beyond her family legacy, colleagues remember Schlossberg for her commitment to environmental journalism and her ability to translate complex climate issues into accessible reporting for mainstream audiences.