
He is probably best known as the voice of Disney's Goofy and the original Bozo the Clown, a part he played for a full decade beginning in 1946. He also provided the voice for Practical Pig, the pig who built the "house of bricks" in the Disney short Three Little Pigs, as well as both Sleepy and Grumpy in Snow White and the Seven Dwarfs, and the barks for Pluto the dog. Colvig worked for not only the Disney studio, but also the Warner Bros. animation studio , Fleischer Studios (Bluto, Gabby), and MGM, where he voiced a Munchkin in The Wizard of Oz.

The Wizard of Oz
1939 · as Munchkins (voice) (uncredited)

Snow White and the Seven Dwarfs
1938 · as Sleepy / Grumpy / Dopey (hiccups) (voice) (uncredited)

Sleeping Beauty
1959 · as Maleficent’s Goon (voice) (uncredited)

Alice in Wonderland
1951 · as Flamingo (voice) (uncredited)

The Adventures of Ichabod and Mr. Toad
1949 · as Ichabod Crane (screaming) (voice)

The Three Caballeros
1944 · as Aracuan Bird (voice) (uncredited)

Fun and Fancy Free
1947 · as Goofy (voice) (uncredited)

Saludos Amigos
1942 · as Goofy (voice)

Motor Mania
1950 · as Goofy (voice)

Boat Builders
1938 · as Goofy (voice) (uncredited)

Three Little Pigs
1933 · as Practical Pig (voice)

Aquamania
1961 · as Goofy (voice)

Thru the Mirror
1936 · as Radio Hiccup (voice) (uncredited)

Magician Mickey
1937 · as Goofy (voice) (uncredited)

Mickey Mouse Happy Birthday Show
1968 · as Goofy

Polar Trappers
1938 · as Goofy (voice) (uncredited)

Gulliver's Travels
1939 · as Gabby (voice) (uncredited)

Billposters
1940 · as Goofy (voice) (uncredited)