"This is an enormous honor. The respect and admiration I have for the Nightly News team has only grown deeper over the last several months that we've been together," Holt said in a statement. "Day-in and day-out under an uncomfortable spotlight, they have produced world-class journalism. I'm very proud and grateful to be part of such an unflappable and dedicated team of professionals as we move forward together."
Williams, 56, will now join MSNBC as an anchor of breaking news and special reports, according to NBC. He will begin his new role in mid-August.
The announcement also included an apology from Williams himself.
"I'm sorry. I said things that weren't true. I let down my NBC colleagues and our viewers, and I’m determined to earn back their trust," Williams said of his return to NBC. "I will greatly miss working with the team on Nightly News, but I know the broadcast will be in excellent hands with Lester Holt as anchor. I will support him 100% as he has always supported me. I am grateful for the chance to return to covering the news. My new role will allow me to focus on important issues and events in our country and around the world, and I look forward to it."