Though she was best known as a young TV star, Angela Cartwright also appeared in perennial movie musical favorite The Sound of Music (1965). Born in England, Cartwright's family moved to Los Angeles when she was three. Cartwright soon made her film debut, at the ripe old age of three and a half, in Somebody Up There Likes Me (1956). Cast in 1957 as stepdaughter Linda on Danny Thomas' TV hit Make Room for Daddy, retitled The Danny Thomas Show, Cartwright stayed with the series until it ended in 1964. It was Cartwright's two mid-'60s credits, though, that captured the most devoted fans. As The Sound of Music's pretty Brigitta Von Trapp, Cartwright became one of the seven children taught to sing and love life by buoyant nun/stepmother Julie Andrews. With its Rodgers & Hammerstein songs and unbridled sentiment, The Sound of Music broke box office records, becoming a beloved classic. Cartwright then joined the cast of Irwin Allen's low-tech TV series Lost in Space as young teen daughter Penny Robinson. Though the show only ran from 1965 to 1968, Lost in Space attracted a durable cult following; Cartwright had a cameo in the 1998 film version. After Lost in Space ended, Cartwright made sporadic appearances in films and TV in the subsequent decades, including Irwin Allen's disaster flick sequel Beyond the Poseidon Adventure (1979). Married since 1976, Cartwright has two children and made a career outside of acting as a photographer, writer, and boutique owner. Her older sister is actress Veronica Cartwright.