Young Cassidy is a 1965 British biography drama film directed by Jack Cardiff and starring Rod Taylor, Julie Christie, and Maggie Smith. It is a biographical drama based upon the life of the playwright Seán O'Casey.

Jack Cardiff, was a British cinematographer, film and television director, and photographer. His career spanned the development of cinema, from silent film, through early experiments in Technicolor, to filmmaking more than half a century later.