(Cover) - EN Star Style - Emma Watson has been seen looking demure in her upcoming Lancme campaign.

The 21-year-old British actress was unveiled as the new face of the French cosmetics brand earlier this year.

The gorgeous star was pictured shooting her very first campaign for the companys Trsor line a few months back in Paris, which was shot by leading fashion photographer Mario Testino.

An image from the highly anticipated ad has been leaked after a recent bash to celebrate the high-fashion collaboration, with Emma looking stunning in a demure collared top teamed with a brown trilby-style hat.

Emma celebrated the campaign at Paris' Pavillon Gabriel with friends, and photographer Mario was also in attendance. The style expert is a huge fan of actress Emma.

"I've watched Emma grow up. She was a little girl when I first worked with her, then I shot her for Burberry, then British Vogue, then Lancme. The great thing about Emma is that she's a chameleon; she can communicate anything you ask, he is quoted as saying by Style.com.

Emma takes her place as a brand ambassador alongside Julia Roberts, Penlope Cruz and Kate Winslet. (C) Cover Media