Lady Gaga was a "total pro" in 'Sin City: A Dame to Kill For.’
The 'Applause' singer has a cameo role in the crime thriller sequel, and Joseph Gordon-Levitt has claimed she surprised him with her talent in front of the camera.
He told radio station Jam'n 94.5: "She was in 'Sin City 2.' I did a part for (it). (Director Robert) Rodriguez asked me to be in, and Lady Gaga is in a scene of it. And I gotta say, she did a really good job.
"Like, she's a great actress. And I didn't know that. You know she came in and I was like, 'OK sure, they're having a huge pop star do a scene in the movie, I understand.'
"But then she came in and like, nailed it! She had her character down, and she was like a total pro and did a great job. I was really impressed."
Fans needn't worry about Gaga being tempted by the bright lights of Hollywood though -- the 'Poker Face' hitmaker has been hard at work on her upcoming album 'ARTPOP' and recently teased a new track called 'Swine.'
The star has also revealed that she wore some of Michael Jackson's old clothes while working on the record.
She previously said: "I recently bought a bunch of Michael Jackson's clothes -- his actual clothes from his tours.
"The idea was to keep them for him. I actually don't really want to wear them; they're Michael's clothes.
"(But) there's a couple of pieces I have to the side and I have his sweaters that I put on -- I wear that when we're mixing and finish up a record. I feel something from the clothing."
