Gentleman Jim is a 1942 film directed by Raoul Walsh and starring Errol Flynn as heavyweight boxing champion James J. Corbett (1866–1933).

The supporting cast includes Alexis Smith, Jack Carson, Alan Hale, William Frawley, and Ward Bond as John L. Sullivan.

James J. Corbett (Errol Flynn), a brash young bank teller, attends a match with his friend Walter Lowrie (Jack Carson).

He acquires a manager, Billy Delaney (William Frawley), and introduces a new, more sophisticated style of boxing, emphasizing footwork over the unscientific brawling epitomized by world champion John L. Sullivan (Ward Bond).

[11] Flynn was very keen to make the movie and undertook extensive boxing training, working with Buster Wiles and Mushy Callahan.

[12] However, when the US officially entered World War II it was decided to postpone the movie so Flynn could be rushed into Desperate Journey.

Alexis Smith recounted in the biography The Two Lives of Errol Flynn by Michael Freedland how she took the star aside and told him, "'It's so silly, working all day and then playing all night and dissipating yourself.

[1] Filmink magazine called the film "terrific fun and Flynn is splendid – he rarely acted with such infectious enjoyment and is obviously having the time of his life in the title role, a part which obviously was close to his real life personality: big headed, cocky, a bit of a prat, the sort of person who has himself paged all the time at a gym just for the thrill of hearing his name spoken out loud, but with a likeable sheen.