Nathan Lane George Voice Andrea Martin Martha Voice Seán Cullen Eton Voice Robin Duke Penny Voice Kathryn Greenwood Frieda Voice Greg Kramer Anton Voice Debra McGrath Valerie Chuckles Voice Colin Mochrie Bud Chuckles Voice Tony Rosato Duke Voice Maurice Sendak Executive Producer John B. Carls Executive Producer Patrick Loubert Executive Producer Michael Hirsh Executive Producer Clive A. Smith Executive Producer