David Gregory is out as moderator of NBC’s “Meet the Press.”

The journalist confirmed the news, which has long been rumored, in a pair of messages posted Thursday on Twitter:

I leave NBC as I came – humbled and grateful. I love journalism and serving as moderator of MTP was the highest honor there is . (1 of 2)

— David Gregory (@davidgregory) August 14, 2014

(2 of 2) I have great respect for my colleagues at NBC News and wish them all well. To the viewers, I say thank you.

— David Gregory (@davidgregory) August 14, 2014

Gregory, 43, had been named host of the long-running Sunday political show in 2008 following the death of Tim Russert.

NBC News President Deborah Turness confirmed Thursday afternoon in an internal memo that White House correspondent Chuck Todd will replace Gregory. “I am very pleased to announce that Chuck Todd will take the helm on September 7. There is no one with a bigger passion for politics than Chuck,” wrote Turness.

“We have some exciting plans to evolve and update the broadcast under Chuck’s leadership that we will be sharing with you shortly. Chuck will continue as NBC News political director, and will hand over his roles as chief White House correspondent and anchor of MSNBC’s The Daily Rundown,” the executive added.

Turness praised Gregory’s time at the network and said the veteran newsman is leaving NBC after 20 years.

Andrea Mitchell will serve as “Meet the Press” moderator on this weekend’s show, Turness said.

This story was updated at 5:36 p.m.