With the world premiere of Unforgettable taking place on April 18th in Los Angeles, Katherine Heigl will be a guest on Tuesday's episode of Jimmy Kimmel Live! to talk all about her new movie.

Katherine Heigl On Jimmy Kimmel Live! In 2003

Katherine has been a regular guest on the late night talk show over the years, making her first appearance in Season 1 back in 2003. The program is now enjoying its 15th year on air, so be sure to tune in and catch Katherine chatting to Jimmy on ABC at 11:35/10:35C.