Ken Page is an American actor and singer. Page created the role of "Ken" in the original Broadway production of Ain't Misbehavin', and played the role of "Old Deuteronomy" in both the original Broadway and filmed stage productions of Cats. Page is also known as the voice of Oogie Boogie in The Nightmare Before Christmas franchise. He also was in the original Broadway production of The Wiz as The Lion and the first Broadway revival of Guys and Dolls as Nicely-Nicely Johnson.

Old Deuteronomy is a character in T. S. Eliot's 1939 Old Possum's Book of Practical Cats and its 1981 musical adaptation, Cats. He is a wise and beloved elderly cat, further serving as the Jellicle patriarch in the musical. The role of Old Deuteronomy originated by Brian Blessed in the West End in 1981, and by Ken Page on Broadway in 1982. Judi Dench plays Old Deuteronomy in the 2019 film adaptation.