Keira Knightley was horrified after filming her sexy lapdance in DOMINO - because the street gang her character was trying to disarm were real-life thugs.

The slender star had no idea she was gyrating in front of genuine criminals - which included violent gangster Eddie Hernandez.

But director Tony Scott was convinced most actors would be too good-looking to play the parts.

Knightley says, "All of them acted like gentlemen. But it was bl**dy frightening afterwards."

Scott explains, "You can't find faces like that in Hollywood."