Preston Foster, sometimes credited as Preston S. Foster, was an American stage and film actor. He also had a career as a vocalist.
Foster entered films in 1929 after acting on Broadway. He was still appearing on Broadway as late as November 1931, in the cast of the play Two Seconds. He soon reprised that role in a filmed version. His most notable films include Doctor X, I Am a Fugitive from a Chain Gang, Annie Oakley, The Last Days of Pompeii, The Informer, and My Friend Flicka.
While serving with the United States Coast Guard during World War II, he rose to the rank of Captain, Temporary Reserve. He eventually held the honorary rank of Commodore.
Foster enjoyed a secondary career as a vocalist. In 1948, he created a trio consisting of himself, his wife, Sheila and guitarist Gene Leis. Leis arranged the songs and the trio performed on radio and in clubs, appearing with Orrin Tucker, Peggy Ann Garner and Rita Hayworth.