Blake Shelton and Adam Levine will once again return as well, while the fourth chair remains unclaimed.
The OG "Idol" winner joined Blake for a Facebook Live announcement on the country singer's page earlier today.
"I'm finally not knocked up and I can join your show," Clarkson told Shelton. "I'm done having children, so now I can join 'The Voice.' I've been excited about this for a few years now, but the timing wasn't right."
"I'ma win," she added, "I'm excited. I can't wait to turn a chair."
"If you can just make it a year without getting pregnant, that would be great for all of us," Shelton joked.
Clarkson was also one of the names floated online as a potential judge on the upcoming reboot of "American Idol," but according to TMZ, talks fell through over money.