Stuart Zagnit (sometimes credited as Stan Hart) is an American voice, film and television actor.

He has worked in Broadway, off-Broadway, regional and national tours, television, films, commercials, and voice-overs.

Zagnit has worked as a voice actor for 4Kids Entertainment, DuArt Film and Video, and TAJ Productions.

He is best known for voicing Professor Oak in the Pokémon franchise.

This article about an American television actor born in the 1950s is a stub.