The Swedish actor returns as Gunner Jensen in the upcoming action sequel, alongside the likes of Sylvester Stallone, Bruce Willis and Arnold Schwarzenegger.
"It's a lot of fun hanging with those guys," he told Lorraine's Helen Fospero.
"I do most of [my own stunts], that's the idea of the picture. Real guys doing real action with real explosions."
> Read Digital Spy's review of The Expendables 2
On his friendship with Rocky IV co-star Stallone, he said: "He's a very ambition-driven guy, his strength is in his writing.
"He creates these characters, he wrote two great characters for me."
Talking about his Expendables 2 character, he added: "He's an unpredictable drunk Swede with a big knife."
Jason Statham has described the film as an "old-school action" picture.
The Expendables 2 will be released on August 16 and 17 in the UK and US respectively.
Watch a trailer below: