"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.