Lloyd Bridges was originally cast as Whitmore, but he died shortly after production began. Tim Curry was considered for the role of the King of Atlantis. Tommy Lee Jones, Jack Davenport, and Kurt Russell were considered for the role of Commander Rourke. Nathaniel Parker auditioned for the role of Lyle T. Rourke, his voice didn't suit the character, however [?] Don Hahn was so impressed with his performance he cast him in The Haunted Mansion.