Kellan Lutz has never blown up as much stuff as he has on the set of 'The Expendables 3'.

The 'Twilight' actor is part of an all-star cast in the action sequel - written by and starring Sylvester Stallone - and he admits he's having a lot of fun firing guns and destroying buildings and vehicles.

He wrote on his Twitter account: ''I don't think I've shot as many rounds or blown as many things up ever in my life compared to all the fun I'm having... (sic)''

Kellan is joined in the film by returning action heavyweights Stallone, Jason Statham, Jet Li, Dolph Lundgren Randy Couture and Terry Crews - who make up The Expendables mercenary team - and new faces Wesley Snipes, Antonio Banderas, Mel Gibson, Harrison Ford and boxer Victor Ortiz.

Arnold Schwarzenegger also reprises his role as Trench Mauser.

Gibson will play ruthless arms dealer Conrad Stonebanks, who founded The Expendables with Stallone's character Barney Ross, but was suspected to be killed by Ross after he turned bad.

Bruce Willis quit 'The Expendables 3' after reportedly demanding $1 million a day, which the producers were not prepared to pay him to return to the franchise.

'The Expendables 3' is due to hit cinemas in 2014.