Journalist and author Tatiana Schlossberg, the granddaughter of President John F. Kennedy, has died at 35, her family announced on Tuesday.

“Our beautiful Tatiana passed away this morning. She will always be in our hearts,” a message posted to the Instagram account for the JFK Library Foundation read. The post was signed by “George, Edwin and Josephine Moran, Ed, Caroline, Jack, Rose and Rory.”

Schlossberg had written for a number of media institutions and was previously a science and climate reporter for the New York Times. Her book Inconspicuous Consumption: The Environmental Impact You Don't Know You Have was published in 2019. Prior to her career in journalism, Schlossberg attended Yale University, where she met her husband, urologist George Moran, who she married on Martha’s Vineyard in September 2017. She also received a master’s degree in American history from the University of Oxford.

Schlossberg’s death comes one month after going public with her acute myeloid leukemia diagnosis in a piece for the New Yorker titled “A Battle With My Blood.” She was diagnosed shortly after giving birth to her daughter in 2024. In the essay, she spoke about receiving months of medical treatments and the support she received from her family, including her mother, Caroline, who suffered a number of tragedies during her lifetime — including the 1963 assassination of her father.

The title “A Battle With My Blood” also referred to the conflict Schlossberg faced with her cousin, Secretary of Health and Human Services Robert F. Kennedy Jr. She criticized “Bobby” for slashing care that could help support people dealing with cancer, stating, “I watched from my hospital bed as Bobby, in the face of logic and common sense, was confirmed for the position, despite never having worked in medicine, public health, or the government.

“I watched as Bobby cut nearly a half billion dollars for research into mRNA vaccines, technology that could be used against certain cancers; slashed billions in funding from the National Institutes of Health, the world’s largest sponsor of medical research; and threatened to oust the panel of medical experts charged with recommending preventive cancer screenings,” she continued. She also wrote that one of the medications that she said saved her life after she suffered a postpartum hemorrhage is now under review by the Food and Drug Administration, per RFK’s urging.

In the essay, Schlossberg said that her most recent clinical trial could potentially keep her alive for a year.

“My first thought was that my kids, whose faces live permanently on the inside of my eyelids, wouldn’t remember me,” she said, noting that while her son, who is 3, might have a “few memories,” he will eventually “start confusing them with pictures he sees or stories he hears.”

“I didn’t ever really get to take care of my daughter — I couldn’t change her diaper or give her a bath or feed her, all because of the risk of infection after my transplants,” she continued. “I was gone for almost half of her first year of life. I don’t know who, really, she thinks I am, and whether she will feel or remember, when I am gone, that I am her mother.”