Angela Cartwright (9 September 1952) is an English born and American actress who stars in both movies and television programs. She acted as Brigitta in the 1965 movieThe Sound of Music. She also acted as Penny Robinson in the 1960s television series Lost in Space. She is the sister of Veronica Cartwright, who is also a television and movie actress. Angela Cartwright was born in Cheshire, England.