Who's On What Tonight? Your Guide to Late Night TV (Wednesday, August 29, 2012)

CONAN O'BRIEN: Hit and Run's Kristen Bell, Bachelorette's Rebel Wilson, Owl City with Carly Rae Jepsen
DAVID LETTERMAN: First lady Michelle Obama, music group the Chevin
JAY LENO: Real Time with Bill Maher's Bill Maher, singer Tristan Prettyman
JIMMY KIMMEL: REPEAT
JIMMY FALLON: REPEAT
CRAIG FERGUSON: Red Dawn's Jeffrey Dean Morgan, Wilfred's Fiona Gubelmann

Guest lineups are subject to change.

SOURCE: The Late Night TV Page