Sinkin’ in the Bathtub is the first Warner Bros. theatrical cartoon short as well as the first of the Looney Tunes series. The short debuted in April 1930 (most likely April 19), at the Warner Bros. Theater in Hollywood. The cartoon features Bosko, and the title is a pun on the 1929 song Singin’ in the Bathtub. The film was erroneously copyrighted under the same title as the 1929 song.