British actor known for his motion capture and acting work as Gollum in the Lord of the Rings films. He also received acclaim for his depiction of the ape Caesar in Rise of the Planet of the Apes and Dawn of the Planet of the Apes. Additionally, he played the titular character in director Peter Jackson's King Kong. He studied visual arts and theatre in school before joining several touring theater troupes. After graduating college, he appeared in a 1992 episode of Darling Buds of May.