One Wild Oat is a 1951 British film starring Stanley Holloway, Robertson Hare and Sam Costa with a notable appearance by a pre-stardom Audrey Hepburn as an extra. The film was adapted by Vernon Sylvaine from his 1948 play. The stage production debuted at the Garrick Theatre in London and was directed by Jack Buchanan. The stage version starred Robertson Hare, who reprised his role for the film, and Arthur Riscoe (who replaced Alfred Drayton following his death in 1949), the part being played by Stanley Holloway in the screen version. The stage cast where (in order of appearance): Julie Mortimer, Constance Lorne, Robertson Hare, George Bradford/Robert Moreton, June Sylvaine, Arthur Riscoe, John Stone, Ruth Maitland, Tom Squire, Charles Groves, Anne Stapledon, Horace Sequeira and Helene Burl