Rosemary Kennedy Was JFK’s Outgoing, Strong-Willed Sister, Until Her Father Had Her Lobotomized at 23

Black-and-white photo of a young smiling woman in a coat and floral hat walking arm-in-arm with an older man in a suit and fedora, 1938.

Rosemary Kennedy flew into rages her father couldn’t control. So in the fall of 1941, Joseph Kennedy had doctors cut into his daughter’s brain to calm her down. The surgery destroyed her. Rosemary Kennedy spent the next 63 years hidden away — and for a long time, her own siblings weren’t even told where she was.

Black-and-white outdoor photo of the Kennedy family standing in a row on a lawn in front of hedges, including parents and eight children, 1937.
Lined up on the lawn in London in 1937, Joseph Kennedy Sr. and Rose Kennedy pose outdoors with eight of their nine children — including Rosemary and a young John F. Kennedy. Photo by Keystone / Hulton Archive via Getty Images.

Rosemary was awake on the operating table that November when Drs. Walter Freeman and James Watts drilled into her skull. They asked her to keep reciting out loud as they cut, and they stopped only when her words dissolved into nonsense. She was 23 years old.

Her difficulties traced back to her birth in 1918. A doctor wasn’t available in time, so a nurse held her head in the birth canal for about two hours to delay the delivery, cutting off her oxygen. By the age of 2 she hadn’t hit her developmental milestones, and she grew up struggling in school.

Rosemary Kennedy and her father Joseph P. Kennedy standing together at the London Children's Zoo in 1938
Rosemary Kennedy stands with her father, Joseph P. Kennedy, then U.S. Ambassador to Great Britain, at the opening of the London Children’s Zoo in June 1938. Photo by Bettmann / Bettmann via Getty Images.

By her early 20s, Rosemary was having violent outbursts. She was expelled from a summer camp and kept sneaking out of her convent school at night. Doctors told her father that a lobotomy would settle her mood swings, and he arranged the procedure without telling her mother.

Rose Kennedy and her daughters Kathleen and Rosemary leaving their London house in 1938
Rose Kennedy departs her London home with daughters Kathleen and Rosemary in May 1938, headed to a court presentation. Photo by Derek Berwin / Hulton Archive via Getty Images.

The operation left her with the capacity of a toddler. She could no longer walk or talk, became incontinent, and could not make herself understood. Her father had her institutionalized and never visited her again. Her mother stayed away for roughly 20 years.

To the public, the family said Rosemary was a recluse by choice, and later that she was intellectually disabled. They never mentioned the surgery at all. Her siblings didn’t learn where she was living until after Joseph suffered a stroke in 1961.

Black-and-white indoor portrait of the Kennedy family — parents and all nine children — seated and standing in an elegantly decorated room with a fireplace, 1937.
Gathered around a fireplace in a formal sitting room in Washington on December 10, 1937, all nine Kennedy children appear together with their parents Joseph Sr. and Rose in one of the family’s rare complete portraits. Photo by AFP via Getty Images.

Historians now believe Rosemary was likely dealing with depression — nothing that came close to warranting the operation. Watts himself later admitted that what she had looked more like a form of depression. Rosemary Kennedy died in 2005 at the age of 86.

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