Matt Lauer has been fired from NBC.
Savannah Guthrie made the announcement at the top of the "Today" show, where Lauer has been an anchor for two decades.
NBC News chairman Andrew Lack said in a memo to staff that it was the first complaint lodged against Lauer in his career at the network. But he said "we were also presented with reason to believe this may not have been an isolated incident."
Just last week, CBS News fired one of its own morning anchors, Charlie Rose, after a report in The Washington Post chronicled years of sexual misconduct.
Savannah Guthrie said she was informed just moments before going on the air.