40 Pics of Jessica Biel "Bikini Butt & Ass" in Puerto Rico

Clearly in fine form, Jessica is well known for being a dedicated gym bunny, and even she admits she is 'boring' as she keeps to a strict routine.

The actress is in Puerto Rico with her fiancé Justin Timberlake, 31, who's in town with the crew of his new movie, Runner, Runner.

To get a stunning physique like Jessica's does of course involve a lot of sacrifice the actress told ELLE magazine last year. She probably wouldn't be top of your list for a wild night out.

Scroll down to see more Pictures . . . . 

 

Surf's up! Jessica cooled down in Puerto Rico as Justin filmed new movie Runner Runner (Read more and See more Pictures)