STAGE TUBE: Regis and Letterman Perform 'Show Business' Duet

As BroadwayWorld reported, yesterday, television icon Regis Philbin, who has been the male anchor of ABC's Live! for 28 years, announced that come the start of fall he would be retiring from his post. He did not specify a specific farewell date.

Last night, he received a call from David Letterman on which he clarified that he isn't actually retiring - just simply leaving Live!. Before hanging up, the pair snuck in a few bars of "There's No Business Like SHow Business." Click below to watch the clip.

While Regis is most widely known for Live with Regis and Kelly (formerly Live with Regis and Kathy Lee), he has also famously hosted Who Wants to Be a Millionaire, Million Dollar Password, and the first season of America's Got Talent. He also holds the Guinness World Record for the most time spent in front of a television camera.

A crooner himself, Philbin is a longtime supporter of Broadway and New York Theater, welcoming countless theatrical talent on his show as both guests and performers over the years.

He has published two autobiographies, co-authored Bill Zehme: I'm Only One Man! (1995) and Who Wants To Be Me? (2000).