What's Opera, Doc? 1957

Synopsis:

Bugs is in drag as the Valkyrie Brunhilde, who is pursued by Elmer playing the demigod Siegfried.

Directed by: Chuck Jones
Runtime: 7 minutes
Cast:
Mel Blanc
Mel Blanc
Bugs Bunny as Brunhilde / Elmer Fudd as Siegfried (screaming) (voice) 
Arthur Q. Bryan
Arthur Q. Bryan
Elmer Fudd as Siegfried (voice) (uncredited)