Foster, a native of California, won the National Tap Dance Championship after which she was discovered on Star Search as a singer at age five. In 1984, Foster landed her most notable role, in the NBC series Punky Brewster as Margaux Kramer, the spoiled upper class friend of the title character. During the run of Punky Brewster, Foster appeared on Circus of the Stars; she shared an act with actor-musician Corey Yothers, whose sister Tina (of Family Ties fame) was also featured that year in COTS.
Following the end of Punky Brewster in 1988, Foster appeared in various guest roles: on The Wonder Years, Quantum Leap, and Life Goes On. In 1986-87 she was the voice of Holly, the young owner of the Puppy Pound in the Pound Puppies television series. She also voiced Sally Brown in the 1988 animated Peanuts special Snoopy!!! The Musical and Lucy van Pelt in an episode of This Is America, Charlie Brown. In 1989, she had a role in the film Troop Beverly Hills. Foster's last role to date was in a 1995 episode of CBS Schoolbreak Special.
