Conan O'Brien to Appear on 'Late Show' for First Time in 13 Years

Conan O'Brien
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"You worked tirelessly for four years to earn the diploma you will be receiving this weekend. ... And Dartmouth is giving me the same degree for interviewing the fourth lead in 'Twilight.' Deal with it."

Conan O'Brien is stopping by Late Show With David Letterman after last appearing 13 years ago.

The TBS late-night host is set to visit the CBS talker on Thursday, May 17 at 11:35 p.m. and would mark his fifth visit. O'Brien most recently appeared as a guest on the Letterman program on Jan. 13, 1999.

During the Tonight Show debacle in 2010, one of O'Brien's biggest supporters was Letterman, who at one point ran down a Top 10 list of messages left on former NBC executive Jeff Zucker's answering machine on his show. Letterman went through a similar controversy in 1992, taking an offer to join the CBS family when the Tonight Show was offered to Jay Leno instead.

O'Brien took over Late Night in 1993 after Letterman left for Late Show, hosting Late Night until 2009 before he briefly became the host of Tonight Show until January 2010. In November, O'Brien began hosting TBS' Conan.

Guests for the May 17 episode include John Mayer and Regina Spektor.