Hillbilly Hare (1950)
Hillbilly Hare is a 1950 Merrie Melodies cartoon starring Bugs Bunny, produced and released by Warner Bros. Pictures. It was directed by Robert McKimson, with a story by Tedd Pierce and musical direction by Carl Stalling. Bugs as usual is voiced by Mel Blanc, as is Curt Martin; uncredited Stan Freberg and John T Smith both voice Punkin'head Martin, and Smith the jukebox square dance caller.
More at Wikipedia.