Karl Diedrich Bader (born December 24, 1966) is an American actor and comedian. Bader is best known for his voice role as Batman on Batman: The Brave and the Bold. He has appeared in the films The Beverly Hillbillies, Napoleon Dynamite, Office Space and EuroTrip, and on the sitcoms The Drew Carey Show, Veep, Outsourced and American Housewife. He has also done voices for animated projects such as Buzz Lightyear of Star Command, Ice Age and Surf's Up.
His Nickelodeon voice roles include the Rat King on several episodes of The Penguins of Madagascar; and Hundun on Kung Fu Panda: Legends of Awesomeness. He also appeared as a guest contestant on Jeff Sutphen's Figure It Out, a random guy in the crowd of people from the Victorious episode "Tori Goes Platinum", and Chief Donker in two episodes of iCarly, "iGot A Hot Room" and "iPear Store". He now voices Mandroid in Transformers: EarthSpark and Muscle Fish in The Loud House Digital Shorts.