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| "Arrested Development" (2003) TV Series (voice) (uncredited) |
Narrator
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| A Beautiful Mind (2001) (uncredited) |
Man at Gouverners Ball
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| Osmosis Jones (2001) (voice) |
Tom Colonic
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| How the Grinch Stole Christmas (2000) (uncredited) |
Townsperson
... aka The Grinch (Australia) (UK) (USA: promotional title)
... aka Dr. Seuss' How the Grinch Stole Christmas (USA: complete title)
... aka Grinch, Der (Germany)
|
| Return to Mayberry (1986) (TV) |
Opie Taylor
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| When Your Lover Leaves (1983) (TV)
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| Night Shift (1982) |
Annoying Sax Player
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| Fire on the Mountain (1981) (TV) |
Lee Mackie
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| Bitter Harvest (1981) (TV) |
Ned De Vries
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| Act of Love (1980) (TV) |
Leon Cybulkowski
"Fonz and the Happy Days Gang" (1980) TV Series (voice) |
| More American Graffiti (1979) |
Steve Bolander
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| Grand Theft Auto (1977) |
Sam Freeman
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| The Shootist (1976) |
Gillom Rogers
|
| Eat My Dust! (1976) |
Hoover Niebold
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| The First Nudie Musical (1976) (uncredited) |
Auditioning actor
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| I'm a Fool (1976) (TV)
|
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| Huckleberry Finn (1975) (TV) |
Huckleberry Finn
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| "Happy Days" (1974) TV Series |
Richard 'Richie' Cunningham (1974-1980)
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| Locusts (1974) (TV) |
Donny Fletcher
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| The Spikes Gang (1974) |
Les Richter
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| The Migrants (1974) (TV) |
Lyle Barlow
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| Happy Mother's Day, Love George (1973) |
Johnny
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| American Graffiti (1973) (as Ronny Howard) |
Steve Bolander
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| The Wild Country (1971) (as Ronny Howard) |
Virgil
|
| "The Smith Family" (1971) TV Series |
Bob Smith
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| Smoke (1970) (TV) (as Ronny Howard) |
Chris
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| Old Paint (1969)
|
|
| A Boy Called Nuthin' (1967) (TV) (as Ronny Howard) |
Richie `Nuthin'´ Caldwell
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| Village of the Giants (1965) (as Ronny Howard) |
Genius
|
| The Courtship of Eddie's Father (1963) (as Ronny Howard) |
Eddie
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| The Music Man (1962) (as Ronny Howard) |
Winthrop Paroo
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| Door-to-Door Maniac (1961) (as Ronnie Howard) |
Bobby
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| "The Andy Griffith Show" (1960) TV Series (as Ronny Howard) |
Opie Taylor
|
| The Journey (1959) (as Ronny Howard) |
Billy Rhinelander
|
| Frontier Woman (1956) (uncredited) |
Bit Part |