Early life
Bilson was born in Los Angeles, California to a Jewish American father (writer/director/producer Danny Bilson) and a Philadelphia-born Italian American mother, Janice Stango, who is a sex therapist. Her father comes from a showbusiness family, as her great-grandfather, George Bilson, was the head of the trailer department at RKO Pictures, while her great-grandmother, Hattie, was a screenwriter and her grandfather, Bruce Bilson, is a film director. Bilson's parents divorced during her childhood, and in 1997, her father remarried Heather Medway, an actress and the mother of Bilson's half sister Hattie (born December 19, 2001).