As of August 2026, Bob Holt is best known for Snorks and Scooby's All-Stars. Find every show and movie Bob Holt has starred in — and where to watch them — below.
Bob Holt

Bob Holt

Actor Born 1928 St. Louis, Missouri, USA 9 TV Shows 8 Movies

Robert John Holthaus (December 28, 1928 – August 2, 1985), better known as Bob Holt, was an American actor, best known for his voice work.

Holt's first film role came in 1950, acting as Octavius Caesar in Julius Caesar. His career as a voice artist began with the 1968 short film Johnny Learns His Manners, for which he provided all of the voices. He later appeared in such works as Bedknobs and Broomsticks, several animated television specials with Dr. Seuss, for example, The Lorax (1972), Dr. Seuss on the Loose (1973), The Hoober-Bloob Highway (1975) and The Grinch Grinches the Cat in the Hat (1982) and the animated film version of Charlotte's Web as Homer Zuckerman.

Holt appeared in a variety of different works, including animated films for both adults (the 1974 sequel The Nine Lives of Fritz the Cat) and for children, as well as voice and acting work in live-action films (for the blaxploitation film Abby, Holt provided the voice of the Demon). In 1975, he was the voice of Grape Ape on The New Tom and Jerry Show. The same year, Holt provided the voice of Avatar in Ralph Bakshi's film Wizards. Avatar's voice was an imitation of actor Peter Falk.

In 1982, Bob Holt played the title role in Marvel Productions' animated The Incredible Hulk (1982 TV series), also in the process creating a library of stock roars that would be used for many years afterwards.

Bob Holt has built a filmography of 17 credits over a career spanning from 1971 to 1984.

Bob Holt's most notable role to date came in Gremlins (1984), where he played Mogwai / Gremlins (voice). He also appeared in Bedknobs and Broomsticks (1971) as Codfish (voice). Most recently appeared in Charlotte's Web (1973) as Homer Zuckerman (voice).

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📺 Bob Holt's TV Shows

Snorks
Mr. Seaworthy
1984
Scooby's All-Stars
1977
The Scooby-Doo/Dynomutt Hour
Additional Voices (voice)
1976
Challenge of the GoBots
1984
Hong Kong Phooey
1974
Challenge of the Super Friends
1978
The Incredible Hulk
The Hulk (voice)
1982
The Great Grape Ape Show
1975
Sheriff Hoot Kloot
1973

🎬 Bob Holt's Movies

Gremlins
Mogwai / Gremlins (voice)
1984
Bedknobs and Broomsticks
Codfish (voice)
1971
Charlotte's Web
Homer Zuckerman (voice)
1973
Wizards
Avatar (voice)
1977
The Day of the Locust
Tour Guide
1975
The Nine Lives of Fritz the Cat
Various Characters (voice)
1974
The Lorax
The Lorax / The Once-ler (voice)
1972
The Grinch Grinches the Cat in the Hat
The Grinch / Waiter / The Grinch's Mother (voice)
1982

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