Hayes is a Star Wars fan, and has been since childhood. He also collects Star Wars memorabilia, and he even auditioned for a role in Star Wars: Episode III – Revenge of the Sith. After JoJo's Bizarre Adventure licensed the Savage Garden song "I Want You" to be used in the television adaptation of Diamond Is Unbreakable, Hayes expressed his gratitude and also revealed that he is a fan of the series.
