Brian Williams will drop the mic this Thursday, Dec 9th

Brian Williams, who helped put MSNBC on the map 25 years ago, is about to exit the cable news network.

He is signing off from his 11 p.m. Eastern program, “The 11th Hour,” for the final time on Thursday night, a network spokesperson confirmed.

Williams has been alluding to his departure date during segments with some of his regular guests, and viewers have been tweeting out tributes to him.

Here was a message of gratitude at the end of his show four weeks ago.

Williams has anchored “The 11th Hour” for the past five years. He announced last month that he is leaving MSNBC and NBC News to pursue new opportunities — a striking departure given his long-term ties to the company.