Katherine will be a guest on the Late Show with David Letterman on Thursday, May 20th which airs at 11.35pm ET/PT on CBS. She will be in New York to promote the release of her action comedy "Killers" which hits theaters from June 4th.

Katherine Heigl's Most Recent Appearance On The Late Show In July 2009 Katherine Heigl's Most Recent Appearance On The Late Show In July 2009

Her "Killers" co-star Ashton Kutcher will also be a Late Show guest, appearing the following evening (Friday, May 21st) to chat with David.