United Kingdom, May 20 -- Paul Rudd has been "amazed" by Nick Jonas' acting skills in Power Ballad.

The 57-year-old actor stars alongside Nick, 33, in Power Ballad, the new musical comedy drama film, and Paul has admitted to being impressed by his co-star.

Speaking to People, Paul explained: "I can't say that I was surprised because I've seen him act, but he did things that were kind of so subtle and really deft, the stuff that was going on behind his eyes.

"He'd be going through these dilemmas, and he's not saying anything, but you can read his mind. It's such good acting, and I was just amazed at some of the stuff he was doing."

Paul said watching the final edit revealed just how impressive Nick's performance was, particularly in sc...