He is best known for voicing Martian Manhunter from "The Batman" and "Justice League", John Smith from Disney's "Pocahontas" films, Rocky from "Chicken Run", Phoebus from Disney's "The Hunchback of Notre Dame", Clayton from "Tarzan", I. M. Weasel from "I Am Weasel", and Allomere from "Legends of the Guardians: The Owls of Ga'Hoole".