"Born in England, Angela is the younger sister of
actress Veronica Cartwright. As a child she was cast as
the cute little stepdaughter, Linda Williams, on "Make
Room for Daddy" (1953). She was on the show from 1957 to
1964. After that, she was cast as Brigitta in the
popular Julie Andrews movie The Sound of Music (1965).
Soon after, she returned to series TV as Penny Robinson,
young teenage space traveler, in "Lost in Space" (1965),
which ran from 1965-1968.