Clearly portraying the Queen in an Oscar winning role hasn't gone to Dame Helen Mirren's head as she did her own stunts for her latest big-budget film.

Mirren appears alongside Nicolas Cage and Harvey Keitel in National Treasure: Book Of Secrets, her first film since winning an Academy Award for The Queen (pictured).

Speaking in LA, the 62-year-old said she relished the action role.

"I didn't want to be the star of the piece, and I've never been in a big, big, big-budget movie before," she said. "It was wonderful to participate in something like that where there is enough money to do what you want to do. ... Most movies that I'm in, the budgetary considerations are so tight, you have to work so fast, you have to make such compromises all the time, it was great to be in something where that wasn't an issue."

Mirren was happy to swing on a vine among other stunts in her role as Emily Appleton.

"It was fantastic, at the end of swinging on the vine the whole crew just thought I was so funny because I was just yelling with pleasure," she said. "I was so excited about it. And I said to (director) Jon Turteltaub at the end of the day that that was the best day of my professional life."

The joy didn't come without cost either. "I guess I got a few bruises, but you know I get bruised on stage. Bruises are part of your life as an actor."

"I would be so thrilled of people seeing me as an action hero. That would be the pinnacle of my career definitely."

National Treasure: Book Of Secrets opens in the UK on February 8.