British actress Keira Knightley uses a secret trick to deal with the hordes of photographers stationed at red carpet events - she pretends to be someone else. The Atonement star takes on the alias of a former iconic beauty in order to cope with all the attention, and she insists it's the only way she can get through promos. And the super-slender Knightley claims she once envisaged herself as voluptuous screen siren Sophia Loren at the Venice Film Festival in Italy. The 22-year-old says, "When I get out of the car I pretend to be someone else. It's a different person every time. At the Oscars, I was an elegant Edwardian society woman from a painting by John Singer Sargent. "For the Venice Film Festival, I was Sophia Loren. For the premiere of Atonement, I was someone else again, but I won't say who, as it's embarrassing. It's my way of getting through it."