Work Is a Four-Letter Word is a 1968 British satirical comedy film directed by Peter Hall and starring David Warner and Cilla Black, in her only acting role in a cinematic film. The film was not well received by critics even though it was based on the award-winning play Eh? It also marked the acting debut of Elizabeth Spriggs.

David Hattersley Warner was an English actor who worked in film, television and theatre. Warner's lanky, often haggard appearance lent itself to a variety of villainous characters as well as more sympathetic roles across stage and screen. He received accolades such as a Primetime Emmy Award and nominations for a BAFTA Award and Screen Actors Guild Award.