Danny Jacobs, who voices King Julien in the cartoons, is Sacha Baron Cohen's official understudy, replacing him in side materials that otherwise feature the main voice cast, such as all the holiday specials and the Madagascar 3 Soundtrack. Before Danny, Keith Ferguson did the voice of Julien for the first Madagascar video game.
In video games, commercials, and theme park attractions, the Celebrity Voice Actors usually have substitutes - Wally Wingert and Crispin Freeman for Ben Stiller as Alex, Phil Lamarr for Chris Rock as Marty, Stephen Stanton for David Schwimmer as Melman, and Bettina Bush for Jada Pickett-Smith as Gloria.
