Diedrich Bader is an American actor and voice artist, best known for his roles in television and film. He gained popularity for his portrayal of Oswald Lee Harvey on the sitcom The Drew Carey Show and has appeared in various other TV series and movies throughout his career. In addition to live-action roles, Bader has lent his voice to numerous animated characters, including Batman in the animated series Batman: The Brave and the Bold. His versatile talent has made him a recognizable figure in both comedy and animation, contributing to his lasting presence in the entertainment industry.