On the heels of her "Couples Retreat" promotional tour, Kristen Bell was out hamming it up for her new flick "Astro Boy" at the Hollywood premiere last night (October 19).

The "Veronica Mars" actress looked to be in good spirits as she posed for the paparazzi outside Mann Chinese 6 Theater in Los Angeles.

And Kristen gave the boys plenty to drool over as she meandered around in her strapless black, white, and blue dress teamed with strappy black heels.

Miss Bell is part of an all-star voice cast in "Astro Boy" including Samuel L Jackson, Nicolas Cage, Charlize Theron, and Eugene Levy. The film opens nationwide on October 23rd.

Enjoy the pictures of Kristen Bell at the premiere of "Astro Boy" (October 19).