Conan O'Brien is a host on television.
Conan is a late-night talk show airing each Monday through Thursday at 11:00 p.m. eastern time on TBS in the United States . Conan O'Brien . O'Brien was a writer and producer for The Simpsons for two seasons until he was commissioned by NBC to take over David Letterman 's position as host of Late Night in 1993 . He has hosted Conan since 2010 and has also hosted such events as the Emmy Awards and Christmas in Washington . With the retirement of David Letterman on May 20 , 2015 , O'Brien became the longest-working of all current late-night talk show hosts in the United States , at 22 years . Late Night with Conan O'Brien is an American late-night talk show hosted by Conan O'Brien that aired 2,725 episodes on NBC between 1993 and 2009 .