Katherine Heigl yellow dress dave letterman nycKatherine Heigl showed up to the Late Show With David Letterman yesterday looking less like a Killer and more like a killer bee!

Wearing a yellow dress with black accessories, Katherine was in the big apple promoting her new film, The Killers, which opens June 4th.

Katherine also talked about her former job on Grey's Anatomy, which she left earlier this year to focus on films motherhood.

"It's a weird feeling because it's very bittersweet," Heigl told Dave about no longer being able to watch the show. "I really did like my job and I really loved the people I worked with."

"I stopped watching in November when I went on family leave because I felt like I was missing the party," the actress said. "It was weird...I actually get a little bit jealous about Alex sleeping with other women. It's really inappropriate."

Wonder how her hubby Josh feels about that???