Kristen Stewart is on The Late Show with David Letterman tonight. The Twilight star is promoting her new movie which opens in theaters across the country tomorrow. Most of the opening night screenings are already sold out so if you don't have a ticket for the big night, you better get one fast.

Earlier in the day her co-star Robert Pattinson appeared on the Tyra Banks talk show. It is a full on Twilight media assault.