Joss Whedon is back with a new passion project, and he’s enlisted a few friends — a few very famous, superhero friends — to help.

The writer-director has launched Save the Day, a super PAC focused on encouraging Americans to get out and vote on Election Day. The first phase of that effort is a star-studded PSA that launched Wednesday featuring the likes of Robert Downey Jr., Mark Ruffalo, Scarlett Johansson, Don Cheadle, Julianne Moore, Yvette Nicole Brown, and Leslie Odom Jr.

Whedon debuted the initiative on his newly-restored Twitter page, writing, “Hey! Did I miss anything? Lol jk the world is on fire here’s a thing I made.”

The Save the Day website reads, “We are a short-form production company dedicated to the idea that voting is a necessary and heroic act. That every voice in this wonderfully diverse nation should, and must, be heard. That the only thing that can save democracy is the act that defines it. We are committed to fighting the apathy, cynicism, and honest confusion that keeps citizens from using their vote. And to reminding an increasingly out-of-touch and compromised set of representatives that they are answerable to the people they were hired to serve.”

The Whedon-helmed PSA, titled “Important,” features that bevy of celebrities urging Americans to vote on Nov. 8. While it doesn’t mention either Republican or Democratic presidential candidates Donald Trump or Hillary Clinton by name, Cheadle warns against “a racist, abusive coward who could permanently damage the fabric of our society.” Odom Jr. also asks, “Do we want to give nuclear weapons to a man whose signature move is firing things?”

In an interview with BuzzFeed released Wednesday, Whedon explained how he was able to get so many stars onboard for the project. “There is almost nobody that I wouldn’t approach to say, ‘If you can pitch in, do it now,’” he said. “It was pretty much the same spiel to everybody: ‘Doing a voting PSA to help get out the vote and stop orange Muppet Hitler.'”