The Total Recall actress told Maxim that she finds undergarments to be much too constraining for everyday wear.
"I don't wear knickers. I mean, unless I'm wearing a very short skirt - or maybe if I'm going on a mountain expedition with extra layers," she clarified, adding: "But no, I don't like them!"
The Underworld star was also quizzed on if her action roles have helped her develop any secret talents.
"Apparently, I'm very good at firing a gun without blinking, which is unusual," the star explained. "That's why so many action characters have to wear sunglasses during shootout scenes. That's my party trick."
Beckinsale stars with Jessica Biel and Colin Farrell in the upcoming remake of Total Recall, opening on August 3 in the US and August 29 in the UK.
Watch a Total Recall trailer below: