Paul Williams appears in his "Battle for the Planet of the Apes" costume on "The Tonight Show" in 1973.

Paul Hamilton Williams, Jr. American composer, musician, songwriter, and actor. He is perhaps best known for popular songs performed by a number of acts in the 1970s including Three Dog Night's "An Old Fashioned Love Song", Helen Reddy's "You and Me Against the World", and the Carpenters' "We've Only Just Begun" and "Rainy Days and Mondays", as well as his contributions to films such as "Evergreen" from A Star Is Born and "Rainbow Connection" from The Muppet Movie.

He was also Virgil in Planet of the Apes.