The Avengers director enlisted Keegan-Michael Key and Avengers co-stars Mark Ruffalo, Robert Downey Jr., and Scarlett Johansson to help urge Americans to vote in November's (16) presidential elections.

"You might think it's not important, you might think you're not important," Ruffalo says in the video, before a string of celebrities add, "and the only way we can prove that to you is to show you lots of famous people... show you how important... it is."

"And if you do vote," the stars add, "Mark Ruffalo will do a nude scene in his next movie."