Santa Claus is Comin' to Town is a 1970 stop motion Christmas television special produced by Rankin/Bass Productions. The film stars Fred Astaire as the narrator S.D. Kluger, Mickey Rooney as Kris Kringle / Santa Claus, Keenan Wynn as the Winter Warlock, and Robie Lester, Joan Gardner, and Paul Frees as well as an assistant song performance by the Westminster Children's Choir. The film tells the story of how Santa Claus and several Claus-related Christmas traditions came to be. It is based on the hit Christmas song "Santa Claus Is Comin' to Town", which was introduced on radio by Eddie Cantor in 1934, and the story of Saint Nicholas.