In this movie, we get to see back nudity from both Brad Pitt and Bruce Willis. Bruce Willis is seen naked when getting washed by a hose. Brad Pitt dropping his PJ down before being chased by the nurses. Since there is no frontal view, circumcision status is not visible for either of them. However it is known for Brad Pitt from paparazzi shots, and for Bruce Willis from another movie.
One hour in the movie, Bruce Willis is naked in a pool. The camera is under water and we can clearly see his circumcised dick as he fools around with a woman. We also see his butt and his hairy crack in the pool. There are other love scenes after in the movie, but which reveal less.