Emily Blunt has joked that her Five-Year Engagement co-star Jason Segel was "very willing" to drop his trousers in the film.
The pair play Violet and Tom, whose relationship becomes strained when their wedding is continually delayed, and Muppets star Jason appears in the buff in one scene.
British star Emily told E! Online: "Jason was happy to get that thing out at all times. He seems to be very willing."
She laughed: "I didn't want to see it!"
Emily, 29, and Jason, 32 - who previously bared all in 2008 comedy Forgetting Sarah Marshall - are good friends in real life and the actress said she loved working with him on the romantic comedy, which also stars Rhys Ifans and Chris Pratt.
"He's my friend and he wrote it for us, and it was great because he knows my voice so he wrote it with me in mind, which is really fun," she said.