Conan O'Brien is a person.
Conan Christopher O'Brien ( born April 18 , 1963 ) is an American television host , comedian , and television producer . He served as president of The Harvard Lampoon while attending Harvard University , and was a writer for the sketch comedy series Not Necessarily the News . 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 . Afterwards , O'Brien relocated from New York to Los Angeles to host his own incarnation of The Tonight Show for seven months until network politics prompted a host change in 2010 .