Mark Hamill's Swamp Thing Fights Solomon Grundy in JUSTICE LEAGUE ACTION Clip

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Mark Hamill has had a very successful career as a voiceover artist, and it all started with The Joker in Batman: The Animated Series. Hamill now lends his voice to a completely different character in the DC Universe as Swamp Thing in the Justice League Action series. 

In the clip for the upcoming episode "Zombie King," we see Swamp Thing get into a fight with Solomon Grundy. I don't know if you've been watching this series or not, but there are aspects of it that I like. It's not the greatest animated series, but it's got some fun moments.

The voice cast for the series also includes Kevin Conroy as Batman, Mark Hamill pulling double duty as the Joker, James Woods as Lex Luthor, Diedrich Bader as Booster Gold, Sean Astin as Shazam, Rachel Kimsey as Wonder Woman, Jason J. Lewis as Superman, Chris Diamantopoulos as Green Arrow, and Josh Keaton as Green Lantern.

The Star Wars icon doesn't just voice Joker on the animated series! Hear Hamill as DC Comics hero Swamp Thing, as he takes on Solomon Grundy, in a clip from the episode "Zombie King", airing February 4th on Cartoon Network. Justice League Dark Clip: Batman vs.