William Colgate is a Canadian actor known for his extensive work in voice-over, particularly in animated series and films. Born in Toronto, Ontario, he has built a diverse career spanning several decades, contributing his voice to numerous characters in children's entertainment.

Colgate's voice acting portfolio includes a variety of roles in anime and animated productions. He is notably recognized for voicing Dr. Hornbender, an old goat astrologist, in the Japanese-Canadian children's series Pecola. Another prominent role is the Dragonoid Colossus in the English adaptation of the anime series Bakugan Battle Brawlers: Gundalian Invaders.

His work in the Bakugan franchise is part of a broader association with the Beyblade series, where he had multiple roles. In the original Beyblade, he voiced characters such as Mr. Dickenson and various background figures. He continued with these roles in Beyblade: V-Force and Beyblade G Revolution, and later voiced the character Hokuto in Beyblade: Metal Fusion and Beyblade: Metal Masters.

Beyond these series, Colgate's anime voice credits include Apollis in Power Stone and the role of Roshi in the DiC English dub of Saint Seiya. His voice acting extends to other animated productions, such as King Audie and Panno in Pandalian, and roles in series like Rocket Monkeys, Spliced, and Skyland. In addition to voice work, his on-screen acting credits include appearances in live-action television series and films such as Searching for Bobby Fischer and Pushing Tin.