Acting

1994

as (voice) (archive footage) (uncredited)

1986

as Rotten Rodney (voice)

1984

as Mogwai / Gremlins (voice)

1983

as (voice)

1982		Flash Gordon: The Greatest Adventure of All as Dr. Hans Zarkov (voice)
1982		The Grinch Grinches the Cat in the Hat as The Grinch / Waiter / The Grinch's Mother
1982		Puff the Magic Dragon: The Incredible Mr. Nobody as Father

1981		Dennis the Menace in Mayday for Mother as Henry Mitchell (voice)
1981		Strawberry Shortcake in Big Apple City as Coco Nutwork (voice)

1977		The Mouse and His Child as Muskrat (voice)
1977		Wizards as Avatar (voice)

1976

as Dogfather / Rocky McSnarl / Doctor (voice)

1975		Rockhounds as Dogfather / Pug / Boy (voice)
1975		Goldilox & the Three Hoods as Dogfather (voice)
1975		Il giorno della locusta as Tour Guide
1975		Eagle Beagles as Dogfather (voice)
1975		From Nags to Riches as Dogfather / Pug (voice)
1975		Haunting Dog as Dogfather (voice)
1975		Rock-A-Bye Maybe as Dogfather (voice)
1975		M-O-N-E-Y Spells Love as Dogfather / Pug / Rocky / Priest (voice)
1975		Saltwater Tuffy as Dogfather / Pugg (voice)
1975		Watch the Birdie as Dogfather / Pug (voice)
1975		The Hoober-Bloob Highway as Mr. Hoober-Bloob (voice)

1974		Bows and Errors as Dogfather (voice)
1974		Deviled Yeggs as Dogfather / Pug (voice)
1974		Abby ...la storia di una donna posseduta! as The Demon (voice)
1974		The Big House Ain't a Home as Dogfather / Pug (voice)
1974		Mother Dogfather as Dogfather / Pug (voice)
1974		Heist and Seek as Dogfather / Pug / Translator (voice)
1974		The Goose That Laid a Golden Egg as Dogfather / Pug (voice)
1974		Le nove vite di Fritz il gatto as Various Voices
1974		Oliver Twist as (voice)
1974		The Dogfather as Dogfather (voice)
1974		Mesa Trouble as Hoot Kloot / Fester / Townspeople (voice)
1974		Saddle Soap Opera as Hoot Kloot / Fester (voice)
1974		Big Beef at the O.K. Corral as Hoot Kloot / Fester (voice)
1974		By Hoot or By Crook as Hoot Kloot / Fester (voice)
1974		The Badge and the Beautiful as Hoot Kloot / Fester (voice)
1974		Strange on the Range as Hoot Kloot / Fester / Billy the Kidder (voice)
1974		As the Tumbleweed Turns as Hoot Kloot / Fester / Railroad President (voice)
1974		Gold Struck as Hoot Kloot / Fester (voice)
1974		Giddy Up Woe as Hoot Kloot / Fester / Robber / Alf Willett (voice)
1974		Phony Express as Hoot Kloot / Fester / Mailman / Thief / Horse / Postmaster (voice)

1973		The Bear Who Slept Through Christmas as Santa Claus (voice)
1973		B.C.: The First Thanksgiving as Wiley / Grog
1973		Dr. Seuss on the Loose as Sneetches / Sylvester McMonkey McBean (voice)
1973		Stirrups and Hiccups as Hoot Kloot / Fester / Mild-Bill Hiccup / Wild-Bill Hiccup / Wyatt Earp (voice)
1973		Ten Miles to the Gallop as Hoot Kloot / Fester (voice)
1973		Pay Your Buffalo Bill as Hoot Kloot / Fester (voice)
1973		A Self-Winding Sidewinder as Hoot Kloot / Fester / Crazywolf / Townspeople (voice)
1973		The Shoe Must Go On as Hoot Kloot / Fester (voice)
1973		Apache on the County Seat as Hoot Kloot / Fester / Indians (voice)
1973		La meravigliosa, stupenda storia di Carlotta e del porcellino Wilbur as Homer Zuckerman (voice)
1973		Wham and Eggs as Dragon (voice)
1973		Kloot's Kounty as Hoot Kloot / Fester (voice)

1972		Clerow Wilson and the Miracle of P.S. 14 as Announcer / Mr. Perkins (voice)
1972		Support Your Local Serpent as Blue Racer / Japanese Beetle / Venus Flytrap / Jake (voice)
1972		Flight to the Finish as Crazylegs Crane (voice)
1972		The Lorax as The Lorax / The Once-ler (voice)

1971		Pomi d'ottone e manici di scopa as Codfish (voice)
1971		The Wizard of Id

1970

as Chief Strong Eagle

1959

as Police Dispatcher