Sean Penn turns action hero in 'The Gunman'

 US actor Sean Penn, who won Oscars for his brooding ex-convict in "Mystic River" and a doomed gay rights leader in "Milk", turns action hero in "The Gunman" -- a thriller that had its world premiere in London on Monday, AFP reports.

Starring alongside Spain's Javier Bardem and Britain's Idris Elba, Penn plays a former assassin whose last job -- killing a politician from the Democratic Republic of Congo -- comes back to haunt him.

The film is based on a novel by Frenchman Jean-Patrick Manchette, and is set in the DRC, as well as Barcelona, London and Gibraltar. It is being released from Wednesday.

Director Pierre Morel, the Frenchman behind "Taken" and "From Paris With Love", told AFP he was drawn to making movies that weren't just "action for action's sake".

"I always say, if it's a movie which is driven by action, then I'm interested. A smart story with action in it, then I'm all for it," Morel said.

He praised stars Penn, Bardem and Elba as easy to work with.

"These guys are so talented, they work so hard, that you know that they are going to deliver," Morel said.

With 40 films under his belt, the 54-year-old Penn has not played an action hero since Sydney Pollack's "The Interpreter" in 2005.

Like in "No Country for Old Men" and "Skyfall", Bardem is once again a villain.

He is joined by British actor Mark Rylance, who stars in the new television drama "Wolf Hall" about the court of king Henry VII.

The female lead is Italian actress Jasmine Trinca.