JASON SEGEL nude - 40 images and 11 videos - including scenes from "Forgetting Sarah Marshall" - "Knocked Up" - "Slackers". Forgetting Sarah Marshall Highlight: In this movie, you can see Jason Segel naked a lot through long and repeated scenes. One of his costars is Russell Brand that you will see in some of the screen shots, although Russell does not appear fully nude. Apr 16, · Segel also wrote the film's script, basing the scene on a real-life naked breakup of his own. Still, the actor-writer contemplated inequalities between male and female film nudity before putting his family jewels on display.