Cineplex Odeon Corporation was one of North America's largest movie theatre operators and live theatre, with theatres in its home country of Canada and the United States. The Cineplex Odeon brand is still being used by Cineplex Entertainment at some theatres that were once owned by the Cineplex Odeon Corporation, with newer theatres using the Cineplex Cinemas brand. The company was the result of Cineplex Corporation in 1984 purchasing and merging with Canadian Odeon Theatres, which itself was the result of a merger between Canadian Theatres and Odeon Theatres of Canada in 1978.

Plitt Theatres was a major movie theater chain in the United States and went under a number of names, Publix Theaters Corporation, Paramount Publix Corporation, United Paramount Theatres, American Broadcasting-Paramount Theatres and ABC Theatres and operated a number of theater circuits under various names.