Arnold Schwarzenegger is adding some star power to an Oct. 3 rally in front of the Supreme Court against gerrymandering.

California’s former Republican governor is poised to address the crowd on Tuesday before oral arguments begin in Gill v. Whitford, a case focused on the Wisconsin map that the Badger State’s Republican-controlled legislature enacted in 2011. A federal district court panel later ruled that the map was an unconstitutional political gerrymander.

Schwarzenegger, 70, has been a longtime advocate against gerrymandering.

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"Gerrymandering has created an absurd reality where politicians now pick their voters, instead of the voters picking their politicians," the former “Celebrity Apprentice” host said in a February video produced by ATTN:.

Tuesday’s rally is being organized by Represent.Us and Common Cause.