Rulers of the Sea is a 1939 American historical drama film directed by Frank Lloyd and starring Douglas Fairbanks Jr., Margaret Lockwood and Will Fyffe. The film's story is based on the voyage of the SS Savannah, the first steamship to cross the North Atlantic, from Britain to the United States. The film was made by Paramount Pictures, but featured Lockwood and Fyffe who were two of the leading stars of the British Gainsborough Pictures studios. The supporting cast features Alan Ladd.