Reese Witherspoon arriving at the UK premiere for This Means War at the Odeon Kensington, London

Hollywood actress Reese Witherspoon brought some heat to a freezing red carpet, promoting a film which lets fans see her sexy side.

The 35-year-old, who won an Oscar for playing June Carter Cash in Walk The Line, plays a spy at the centre of a love triangle in This Means War.

The starlet braved the British winter at the Odeon Kensington in a green and black sequinned Louis Vuitton minidress, and said she enjoyed vamping it up for the role.

She said: “I think everybody grows up, you become more mature and you want to explore different kinds of stuff, but it’s a very fun comedy too.”

Director McG said: “She’s very sexy in this role. I said to her, ‘Men really like you and you’re America’s sweetheart, the world’s sweetheart’, but we went further with some overt sexuality, gave her a little bit more volume in her hair, a little smokiness to her eyes. A bit more va-va-voom in a knock-out kind of way and she went for it, and she’s really up there on the kitchen counter making out with Chris Pine, then doing the same thing with Tom Hardy.”