Who's On What Tonight? Your Guide to Late Night TV (Wednesday, July 18, 2012)

CONAN O'BRIEN: Breaking Bad's Bryan Cranston, the Ringling Bros.' Globe of Steel, music group Walk the Moon
DAVID LETTERMAN: The Closer's Kyra Sedgwick, music group Red Wanting Blue
JAY LENO: Zoo aficionado Newt Gingrich, Jersey Shore's Snooki, rapper MGK
JIMMY KIMMEL: Total Recall's Kate Beckinsale, music group Rubblebucket
JIMMY FALLON: Dumb and Dumber's Jeff Daniels, former first daughter Jenna Bush Hager, Jeff Musial, music group Refused
CRAIG FERGUSON: Madagascar 3: Europe's Most Wanted's Ray Ramano, music group Trampled By Turtles

Guest lineups are subject to change.

SOURCE: The Late Night TV Page