David Hattersley Warner (29 July 1941 – 24 July 2022) was an English actor, who worked in film, television, and theatre. He attended the Royal Academy of Dramatic Art and worked in the theatre before attaining prominence on screen in 1966 through his lead performance in the Karel Reisz film Morgan: A Suitable Case for Treatment, for which he was nominated for the BAFTA Award for Best Actor in a Leading Role.