Citizen Kane is a 1941 American drama film directed by, produced by, and starring Orson Welles. Welles and Herman J. Mankiewicz wrote the screenplay. The picture was Welles's first feature film. Citizen Kane is frequently cited as the greatest film ever made. For 40 years, it stood at number 1 in the British Film Institute's Sight & Sound decennial poll of critics, and it topped the American Film Institute's 100 Years ... 100 Movies list in 1998, as well as its 2007 update. The film was nominated for Academy Awards in nine categories and it won for Best Writing by Mankiewicz and Welles. Citizen Kane is praised for Gregg Toland's cinematography, Robert Wise's editing, Bernard Herrmann's music, and its narrative structure, all of which have been considered innovative and precedent-setting.

Charles Foster Kane is a fictional character who is the subject of Orson Welles' 1941 film Citizen Kane. Welles played Kane, with Buddy Swan playing Kane as a child. Welles also produced, co-wrote and directed the film, winning an Oscar for writing the film.