Who's On What Tonight? Your Guide to Late-Night TV (Wednesday, September 19, 2012)

CONAN O'BRIEN: The Big Bang Theory's Simon Helberg, Pitch Perfect's Anna Kendrick, music group Delta Rae
DAVID LETTERMAN: Live! with Kelly and Michael's Michael Strahan, Arthur Meyer, music group The Killers
JAY LENO: Parks and Recreation's Amy Poehler, Morning Joe's Joe Scarborough, music duo Big and Rich
JIMMY KIMMEL: Modern Family's Julie Bowen, Arbitrage's Nate Parker, music group Afghan Whigs
JIMMY FALLON: Up All Night's Maya Rudolph, 666 Park Avenue's Dave Annable, Sesame Street's Elmo, music group The Avett Brothers
CRAIG FERGUSON: REPEAT

Guest lineups are subject to change.

SOURCE: The Late Night TV Page