Catherine Anne O'Hara is a Canadian and American actress. She is known for her comedy work on Second City Television (1976–1984) and Schitt's Creek (2015–2020) and in films such as After Hours (1985), Beetlejuice (1988), The Nightmare Before Christmas (1993), and the first two installments of the Home Alone franchise: Home Alone (1990) and Home Alone 2: Lost in New York (1992). Her other film appearances include the mockumentary films written and directed by Christopher Guest: Waiting for Guffman (1996), Best in Show (2000), A Mighty Wind (2003), and For Your Consideration (2006).

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.