Colin Farrell says reading the script for Seven Psychopaths was like getting a slap in the face.
Colin, 36, said: "Every now and then, writing jumps off the page. This one does that. It slaps you in the face, gives you a kick in the a*** and takes you on a wonderful ride."
He said he was delighted to team-up with Martin - who has directed and written the film - again.
"He has a particular way of stringing words together that has an insane effect on the imagination. There's an emotional core to everything he writes, the humour, the chaos, the violence, the quick-wittedness of dialogue," he said.
"And the characters are inspired by a truth - love of a pet, need to help a friend, the wish that a lover was closer, ambition."
:: Seven Psychopaths is in cinemas now.