Source: Matt Lauer Leaving the 'Today' Show

As headlines have Meredith Vieira leaving the "Today" show, a source tells ET and The Insider that Matt Lauer has notified his NBC bosses that he will be resigning from the "Today" show when his contract expires on December 31, 2012.

Could he be thinking about re-teaming with his former "Today" show co-host Katie Couric and his former "Today" show executive producer Jeff Zucker? It has been widely speculated that Couric is expected to leave the "CBS Evening News" and launch her own talk show with Zucker.

The "Today" show released a statement Wednesday, saying, "There seems to be an awful lot of speculation around news anchors these days, and it's not our practice to comment on any of it. Matt Lauer has a long term contract with NBC News and 'Today.'"

Meanwhile, the show commented Tuesday: "The 'Today' show anchors are currently under contract and firmly in place."