We spotted Blake Lively in a pretty white dress arriving at "The Late Show With David Letterman" yesterday. The actress showed off a little bit of cleavage and her long legs.

She appeared on the show to promote her upcoming film "Savages," an Oliver Stone film about two small town marijuana dealers who share a girlfriend Ophelia (Lively). All is well until a Mexican cartel wants a piece of the action and kidnaps Ophelia to make her boyfriends comply with their demands.

Lively is also working on the sixth and final season of the CW series "Gossip Girl." She recently told Bullet magazine, "Gossip Girl was so great, but what's the next challenge in life? Because, you know, six years is a long time."

She recently starred in "The Green Lantern" opposite boyfriend Ryan Reynolds.

See more photos of Blake...