Lucy Liu & Mark Ruffalo: 'David Letterman' Guests!

Lucy Liu is black and white sexy while arriving for a taping of Late Show With David Letterman on Wednesday (October 9) in New York City.

The 44-year-old actress was joined on the show by Mark Ruffalo, who flashed a peace sign.

PHOTOS: Check out the latest pics of Lucy Liu

“It’s like going to a nude beach: It’s all there, there’s nothing to see, it’s done. But when you go to an actual beach and people have bikinis on, there’s something more sexual. So this is a much more interesting dynamic than actually having intercourse and a postcoital scene. This is much more energized. There are some things that have to be sacred, and right now, where we are is where we need to be,” Lucy shared to TV Guide about a romantic relationship between her character Watson and Sherlock on hit show Elementary.

FYI: Lucy is wearing a Band of Outsiders dress, Saint Laurent shoes, and Jimmy Choo bag.

20+ pictures inside of Lucy Liu and Mark Ruffalo arriving at Late Show with David Letterman…