Showing off her sexy bikini body, Kelly Brook was in a playful mood on the set of the new film "Piranha 3-D" in Lake Havasu, Arizona last week.

The British glamour babe joined co-star Riley Steele, as the two frolicked about on a boat - with Miss Steele burying her face in Miss Brook's chest as the cameras rolled on.

Due out on March 19, 2010, the film also stars "Gossip Girl" actress Jessica Szohr, as well as Jerry O'Connell and Elisabeth Shue.

The plot sees "a tremor under the surface of Lake Victoria unleashes scores of prehistoric piranhas, an event which rallies the local sheriff (Shue) who will risk everything to save her townsfolk."

Enjoy the pictures of Kelly Brook and Riley Steele on the set of "Pirhana 3-D" (June 1).