John Gielgud was offered the role of Jack Worthing in this film. Even though it was one of his signature roles on stage, he turned it down because he disliked filming.
Anthony Asquith's first film in colour
The director, Anthony Asquith, was the son of H.H. Asquith who, as Home Secretary, brought the charges of immorality which led to Wilde's imprisonment.
The Importance of Being Earnest opened at the Lyceum Theater (New York City) on April 22, 1895 and ran for 12 performances and has been revived in New York City eight times since as of 2008.
The on-screen credits order is in order of appearance, not in order of importance.