Kick-Ass 2 star Aaron-Taylor Johnson has been pushed "physically and emotionally" while filming his classic monster movie remake, Godzilla.

The 23-year-old actor is currently filming the big budget remake of the classic monster film and says the shoot has taken a toll on him.

Speaking to Total Film, Johnson said: "It's challenging. I've been pushed physically and mentally. The Godzilla crew is such a small group of people that it feels more like an independent movie than anything that I've worked on. I've been pushed pretty hard through some emotional scenes, and my character goes through a lot."

The actor also praised director Gareth Edwards for the film's gritty tone, saying: "He's got a really interesting spin on it. I've hardly done any green-screen stuff for it; he's really clever at doing all the special effects. We'll shoot everything raw on location, on the streets, and he's going to put it all in around us."

In the reboot, Johnson plays a lieutenant in the United States Navy and said he enjoyed preparing for his role.

He further pitched in: "There's an etiquette for guys in the military, so there was training for that - how to hold guns, how to run, and how to talk to other officers. I love all that."