The Blob is an independently made American horror/science-fiction film from 1958 depicting a giant amoeba-like alien that terrorizes the small community of Downingtown, Pennsylvania. It was not until star Steve McQueen became famous with the TV series Wanted: Dead or Alive that the film became a hit at the drive-in theatres. Today, the film is recognized as one of the quintessential 1950s American sci-fi/horror films.
The film was Steve McQueen's debut performance, and also starred Aneta Corsaut. The film's tongue-in-cheek theme song, "Beware of the Blob" (recorded by studio group The Five Blobs), was written by a pre-stardom Burt Bacharach and Hal David and was a nationwide hit in the U.S.