• Mark Hamill, Oscar Isaac, John Boyega, Daisy Ridley and Carrie Fisher speak onstage during Star Wars Celebration 2015 on April 16, 2015 in Anaheim, California.

Mark Hamill, Oscar Isaac, John Boyega, Daisy Ridley and Carrie Fisher speak onstage during Star Wars Celebration 2015 on April 16, 2015 in Anaheim, California. (Photo : Getty Images/Alberto E. Rodriguez)

"Star Wars" actor Mark Hamill's voice has made its way to another DC character in "Justice League Action." The actor usually voices Joker in the animated series and movies but he is now voicing the Swamp Thing in a new episode of the Cartoon Network show.

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The Justice League is one of the largest franchises and well-known super teams in the DC universe. They are often compared to Marvel's Avengers which recently became more popular because of the Marvel Cinematic Universe.

Hamill's Swamp Thing voice is entirely different from the Joker and it shows his talent for being one of the well-known voice actors in the industry. The Swamp Thing battles Solomon Grundy and his army of zombies in the new "Justice League Action" episode, Epic Stream reported.

Interestingly, the Swamp Thing asks Batman for help in defeating Grundy. In the spirit of getting the job done, Batman brings Zatanna and Constantine. Constantine is known for his knowledge and experience with mystic and arcane arts. He has also made an appearance in "Arrow" when Oliver Queen wanted to help the ressurected Sara Lance.

Hamill is joined by Kevin Conroy voicing Batman and James Woods as Lex Luthor in the "Justice League Action" series, Comic Book reported. The series has a new art style and animation that separates it from the previous Justice League shows although the premise is still the same.

"Star Wars VIII: The Last Jedi" also stars Hamill reprising the role of Luke Skywalker. As seen in the last scenes of "Star Wars VII: The Force Awakens," he makes contact with another human after living in solitary for a long time.

Hamill regurarly voices the Joker not only in the animated series but also in video games like "Batman: Arkham Asylum." "Justice League Action" is aired by Cartoon Network.

Watch a clip from the new episode below: