Catherine Anne O'Hara (March 4, 1954 – January 30, 2026) was a Canadian and American actress, comedian, and screenwriter, whose career spanned over 50 years. O'Hara started in sketch and improvisational comedy in film and television before taking dramatic roles to expand her career. She received various accolades including two Primetime Emmy Awards, a Golden Globe Award, and two Screen Actors Guild Awards. Her films have grossed more than US$4.3 billion worldwide. She was appointed an Officer of the Order of Canada in 2017.
O'Hara started her career in the sketch comedy series Second City Television (SCTV; 1976–1984), for which she won a Primetime Emmy Award. She gained acclaim acting in films such as After Hours (1985), Heartburn (1986), Beetlejuice (1988), Home Alone (1990), and Home Alone 2: Lost in New York (1992). She frequently collaborated with Christopher Guest, acting in his mockumentary films Waiting for Guffman (1996), Best in Show (2000), A Mighty Wind (2003), and For Your Consideration (2006).