21 minutes in the movie, Wentworth Miller is naked in bed. At first we don't see much as the camera is filming from the side. But then at the end of the scene, he rolls on the bed, and we get a quick glimpse at his butt.
No frontal nudity in this movie, but Wentworth Miller is known for being uncut.

This movie tells the story of Alexander the Great. The only nude scene is when Alexander is about to make love to his boyfriend Hephaestion, played by Jared Leto. Although the room is dark during that scene, we can see with some details the big penis and balls of Colin Farrell. Too bad we don't get to see them making love together!