Who's On What Tonight? Your Guide to Late-Night TV (Tuesday, Oct. 23, 2012)

CONAN O'BRIEN: Up All Night's Will Arnett, Erin Burnett OutFront's Erin Burnett, The Simpsons' Harry Shearer
DAVID LETTERMAN: Musician Taylor Swift, MSNBC's Rachel Maddow
JAY LENO: Flight's Denzel Washington, NBC News' Richard Engel, music group The Wombats
JIMMY KIMMEL: Mockingbird Lane's Jerry O'Connell, musician Prince, comedian Russell Peters
JIMMY FALLON: Cloud Atlas' Tom Hanks, Fun Size's Victoria Justice, singer Aimee Mann
CRAIG FERGUSON: TV doctor Phil McGraw, Hana Mae Lee

Guest lineups are subject to change.

SOURCE: The Late Night TV Page