Kristen Stewart Wears Army Uniform, Relaxes with a Beer

Kristen Stewart wears her army uniform while filming scenes on a boat for her first day of work on Camp X-Ray on Wednesday (July 17) in Los Angeles.

The 23-year-old actress later changed out of her costume and into some comfy clothes to relax with a beer on the boat with some co-workers.

PHOTOS: Check out the latest pics of Kristen Stewart

In the film, Kristen plays a soldier named Cole assigned to Guantanamo Bay. Lane Garrison and Tara Holt also star.

Earlier in the day, Kristen was seen arriving for work on the boat.