Colin Farrell has admitted that he was intimidated at the prospect of working with Ray Winstone.
The pair are back on the big screen this week in new movie London Boulevard, in which they both play gangsters.
Speaking to the Press Association the actor said: "He's a scary fella - I mean he's a lovely man, the most amiable dude, he really is, but he's a strong man, so it was really fun to play with him.
London Boulevard is the directorial debut for The Departed scriptwriter William Monahan, which also stars Keira Knightley.
The movie follows Mitchel, a man newly released from prison who falls in love with a reclusive young movie star and finds himself in a duel with a vicious gangster.
"If you believe in karma and the idea of Olympians playing chess and using us as pawns, then Mitchel is a man who has made too many missteps to fully realise what he wishes for himself," he continued.
"Mitchel is fairly bright, but he has a natural aptitude for violence. He started running with the wrong people when he was very young and a life of petty crime ensued.
"He keeps getting pulled back into that world of back alleys and vitriol and batons coming out."
It's the first movie for Farrell since Crazy Heart but he also has The Way Back on the horizon, which sees him star alongside Ed Harris and Jim Sturgess.
He has already completed work on Horrible Bosses and Fright Night.
London Boulevard is released 26th November.
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