Pierce Brosnan has revealed that shooting action films is becoming more challenging physically as he gets older.
The Irish star, who played James Bond in four films between 1995 to 2002, admitted returning to the spy world as ex-CIA agent Peter Devereaux in Roger Donaldson's thriller The November Man proved to be harder than he thought.
"Acting is always hard. But action is tough, if you're 24 or if you're a man of a certain age - I'm 61. It gets pretty hard to go out there and do it," he said at the premiere of The November Man in Los Angeles.
The actor continued: "You have to look after yourself. Luckily I had a bunch of the lads from the James Bond days. We worked and worked... so I was well protected by old friends."
But Pierce had no hesitations about playing a spy again.
"The character of Peter Devereaux that I play is a hard-boiled man, a cultured bad-a**, a sassy operative loner and someone who's been in the game for a long time," he said. "I think there is enough time between my days of James Bond and The November Man... for me to jump back into the ring and give it a try."
He joked Peter could take on his former 007 alter-ego in a fight, saying: "Yeah sure, why not? Bring it on! It's all a game anyway."
Pierce's co-star Olga Kurylenko, who starred in Bond film Quantum Of Solace, said her previous experience has helped her.
"Little by little, it (action) becomes like my element. The very first one, (I said) 'What are you guys doing, training me for four hours per day?' But now I know a lot of basic things and that helps. It's always fun," she said.
"It's like when you're a kid and you're playing around - you get to run. And playing next to Pierce is an honour, it was just awesome."
Pierce also paid tribute to Robin Williams at the premiere, who he starred with in Mrs Doubtfire, and who was this week found dead in his Californian home.
Speaking about working with Williams on the hit movie, Pierce said: "My first day on the set, they asked if I wanted to meet Robin. I had never met the man and was so excited and thrilled. I walked into the trailer and there was Robin, sitting there in a pair of Ugg boots, hairy legs, shorts, a Hawaiian shirt, a hairy chest and the head of Mrs Doubtfire. That's how I met Robin Williams," he recalled.
"I had the time of my life. Every day was sheer magic with the man. His humanity, his grace and his brilliance of heart, mind, soul, reverence and sincerity," he added.