Kate Barry was a British fashion photographer, who worked for Vogue and The Sunday Times Magazine. Barry was the daughter of British actress and singer Jane Birkin and the composer John Barry. Her maternal grandmother was the actress Judy Campbell and her uncle was the director Andrew Birkin. She moved from Britain to France as a child and was raised by her mother and her partner Serge Gainsbourg. She had no contact with her biological father until she was 13 when her mother and Serge Gainsbourg separated. She had two half-sisters on her mother’s side, French actress and singer Charlotte Gainsbourg and singer Lou Doillon. She had two half sisters on her father’s side, Suzy and Sian and a half brother, Jon-Patrick. Her son is Roman de Kermadec.

Barry became addicted to drugs as a teenager. After recovering she set up a centre for recovering drug addicts in Paris.