Learning to shoot guns for Miami Vice made Colin Farrell and Jamie Foxx the best of friends.
Farrell said the intense weapons training the two actors went through before work started on the project brought them closer together.
He said: "We spent hours and hours on the range. You learn to trust each other real quick on the range. When someone is stood behind you with a fully loaded gun trust is important."
Earlier this week, Farrell revealed he would like to act on TV again. The Irish actor who has starred in a host of hit Hollywood movies, including Phone Booth and S.W.A.T., got his first break on British TV.
Asked if he would consider returning to the small screen, Farrell said: "If the part was right, I would take it. I started out in Ballykissangel and loved it."