Cast and credits of How I Wet Your Mother

Dan Castellaneta
Santa's Little Helper / Homer Simpson / Barney Gumble / Dr. B.F. Sherwood / Sideshow Mel / Abraham Simpson / Robin Williams / John Travolta (voice)

Julie Kavner
Marge Simpson (voice)

Nancy Cartwright
Bart Simpson (voice)

Yeardley Smith
Lisa Simpson (voice)

Hank Azaria
Carl / Apu / Shameful Eddie's Worker / Prof. Frink / Disco Stu / Moe Szyslak / Chief Wiggum / Lou / Cletus (voice)

Harry Shearer
Waylon Smithers / Lenny / Mr. Burns / Ned Flanders / Ronald Reagan (voice)

David Byrne
Performer - 'Dream Operator' (voice)

Glenn Close
Mona Simpson (voice)

Chris Edgerly
Death (voice)

Pamela Hayden
Woman at Party (voice)

Tress MacNeille
Keggy (voice)