Sylvester Stallone revealed he suffered one of his most-serious injuries to date during the filming for The Expendables 3.
The 68-year-old, best known for his roles as Rocky and Rambo, made the announcement during a glitzy premiere of the film at Leicester Square.
He suffered from a back injury which needed surgery as he filmed action scenes for the third instalment of The Expendables, reprising his role as leader Barney Ross, one of a number of mishaps for the stars.
The Expendables 3 premiere
"Through Rambo and The Expendables, I break my neck and my spine and I dislocate both shoulders. In this one here, I end up really taking a fall on my back and had some metal put in there, so if you hear any squeaking, it's not my shoes but my back. But I'm getting better."
Stallone was joined by co-stars including Jason Statham, Wesley Snipes, Antonio Banderas and Kellan Lutz ahead of the film's world premiere in London tonight.
Spanish actor Banderas, who plays Expendables newcomer Galgo, revealed he kept his injuries a secret.
"I was injured in my first take but I went through the whole movie without saying anything because I didn't want them to think I was just getting older," the 53-year-old said.
"I got a pain in my right knee, from running up the roof to the helicopter. Now it's gone but it stayed there for a couple of months."
The Expendables 3 sees Harrison Ford and Mel Gibson as well a younger generation of actors such as mixed martial arts fighter Ronda Rousey and boxing champion Victor Ortiz joining the team, which already includes action stars such as Dolph Lundgren, Terry Crews and Arnold Schwarzenegger.
The film is released in cinemas on August 14.
