Frank Sidney Hagney was an Australian actor. He is known for his work on It's a Wonderful Life (1946), Ride Him, Cowboy (1932) and The Sea Beast (1926).

The Sea Beast is a 1926 American silent drama film directed by Millard Webb, starring John Barrymore, Dolores Costello and George O'Hara. The film was a major commercial success and one of the biggest pictures of 1926 becoming Warner Brothers' highest grossing film. The Sea Beast is the first adaptation of Herman Melville's 1851 novel Moby-Dick, a story about a monomaniacal hunt for a great white whale. However, the film alters the novel's plotline by establishing prequel and sequel elements that are not in the original story—such as the romancing of Esther and Ahab's safe return, respectively—and substitutes a happy ending for Melville's original tragic one. Some of the characters in the film do not appear in Melville's original novel. The film was so successful that in 1930 Warner Bros redid it in English and German, under the title Moby Dick, with Joan Bennett taking the role of Ahab's love because Dolores Costello was pregnant at the time.