Who's On What Tonight? Your Guide to Late-Night TV (Monday, September 17, 2012)

CONAN O'BRIEN: The X-Factor's Simon Cowell and Demi Lovato, music duo Nancy and Beth
DAVID LETTERMAN: Looper's Joseph Gordon-Levitt, The Mindy Project's Mindy Kaling, music group Of Gentlemen and Cowards
JAY LENO: Arbitrage's Richard Gere, NCAA wrestling champion Anthony Robles, music group Rascal Flatts
JIMMY KIMMEL: Go On's Matthew Perry, Texas Ranger Josh Hamilton, musician Kreayshawn
JIMMY FALLON: Arbitrage's Susan Sarandon, Dredd 3D's Karl Urban, Jim Hamilton
CRAIG FERGUSON: Big Brother's Julie Chen, former football player Warren Sapp, musician Lianne La Havas

Guest lineups are subject to change.

SOURCE: The Late Night TV Page