"You say, 'Vote,' and someone says, 'Democracy is a sham. Those people don't work for me. The system is rigged,'" Williams opens the powerful clip, before describing several other common excuses why people don't head to the polls.
"This is not about the White House. This is about your house. If you're not registered to vote, you can't sit on a jury. You can't choose your mayor. You can't choose your city council. You can't even choose your district attorney," he continues. "You can't decide which measures will help your family and community, and which will put them at risk."
"This government was designed to be changed. You can either make that change, or you can take what little they give you," he says. "Democracy is not a sham. It's a job. It's our job. And it took too goddamn long to get it to just let it slide."
"You say, 'Vote,'" Williams concludes the ad, "because there are people who still don't want you to."
This isn't the first time Williams has used his star power to make a statement. In June, the Grey's Anatomy star received a standing ovation at the BET Awards after delivering a powerful, politically-charged speech.
"I'm here for all the incredible protestors, activists, attorneys, organizers that are sacrificing [an] incredibly great deal to be heard and get access to equal rights and justice in this country," Williams told ET before calling for freedom and justice against an oppressive system.
"My personal experience doesn’t necessarily fuel my ability to see humanity in places, and in the places they tell us it doesn't lurk,” he said. “We should be able to ask others to see themselves in us and we should be able to see ourselves in others."