Waiting for Guffman is a mockumentary starring, co-written and directed by Christopher Guest that was released in 1997. Its cast included Catherine O'Hara, Eugene Levy, Fred Willard, Parker Posey.
The title of the film is a reference to the Samuel Beckett play, Waiting for Godot — similarly, the titular character never appears. As in the other mockumentaries created by Guest, the majority of the dialogue is improvised. Because the film is about the production of a stage musical, it contains several original musical numbers.