Katherine Heigl1

Having flown into the Big Apple the previous evening, Katherine Heigl looked beautiful in blue as she visited the Ed Sullivan Theatre on Monday afternoon (July 20).

There for an appearance on the "Late Show with David Letterman," Miss Heigl has been busily doing her best to promote her upcoming romantic comedy, "The Ugly Truth".

The film tells the tale of "a romantically challenged morning show producer (Heigl) who’s reluctantly embroiled in a series of outrageous tests by her chauvinistic correspondent (Butler) to prove his theories on relationships and help her find love."

Co-starring Gerard Butler, the Robert Luketic directed film hits theaters this Friday (July 24).