Rock-A-Bye Baby is a 1958 American musical comedy film starring Jerry Lewis. A loose remake of Preston Sturges' film The Miracle of Morgan's Creek (1944), the film was directed and written by Frank Tashlin, and features Marilyn Maxwell, Connie Stevens and Reginald Gardiner.

Jerry Lewis was an American comedian, actor, singer and humanitarian who was famously nicknamed "The King of Comedy", with a career lasting over eight decades. He appeared in more than 59 motion pictures, including the first sixteen films with his partner, singer Dean Martin, during their act as Martin and Lewis.