Matthew Keeslar is an American retired actor. He is known for his roles in Waiting for Guffman, The Last Days of Disco, Scream 3, and the miniseries Frank Herbert's Dune and Stephen King's Rose Red.

Waiting for Guffman is a 1996 American mockumentary comedy film written by Christopher Guest and Eugene Levy, and directed by Guest. The film's ensemble cast includes Guest, Levy, Catherine O'Hara, Fred Willard, Bob Balaban and Parker Posey.