Karl Diedrich Bader (born December 24, 1966) is an American actor and voice actor who voices Batman on Harley Quinn.

He has also voiced some minor characters, including No Pinkie Pete in "Til Death Do Us Part", a trainer in "A High Bar", a goon in "Finding Mr. Right" and a guard in "All the Best Inmates Have Daddy Issues".

Before Harley Quinn he has voiced the character of Batman twice before, in the TV series Batman: The Brave and the Bold as well as the 2014 movie JLA Adventures: Trapped in Time. He has also appeared in other DC properties such as Zeta Project, The Batman, Green Lantern: The Animated Series, Superman: Red Son and Justice League Action among others.

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