The Sky's The Limit is a 1943 romantic musical comedy film starring Fred Astaire and Joan Leslie, with music by Harold Arlen and lyrics by Johnny Mercer. The film was directed by Edward H. Griffith, and released by RKO Radio Pictures. Astaire plays a Flying Tiger pilot on leave. Robert T. Smith, a real former Flying Tiger pilot on leave before joining the Army Air Forces, was the technical adviser on the film. The comedy is provided by Robert Benchley — his second appearance in an Astaire picture — and Eric Blore, a stalwart from the early Astaire-Rogers pictures.