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 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.