Emma Watson is about to sign a six-figure deal to become the latest ambassador for Lancome.

The campaign is to be shot by celebrated fashion photographer Mario Testino next month, and will feature Emma as the face of the French beauty brand in posters and TV advertising.

‘It’s so exciting, I can’t wait to start shooting,’

Emma, 20, said. ‘Although I don’t wear much make-up I’m a big fan of Lancome products, especially their mascara.’

Power players: Emma Watson, who is set to the the new face of Lancome,  partied until 3am at Mahiki nightclub in London after attending a pre-BAFTA bash with movie mogul Harvey Weinstein on Friday night

Stylish: The former face of Burberry was elegant in her £1,700 Burberry Prorsum leather sleeved trench that showed off her slender legs

The fresh-faced actress will be quite a change from Lancome’s previous thirtysomething ambassadors, who have included Juliette Binoche, Uma Thurman and Julia Roberts.

The deal comes as Emma prepares to bid farewell to the Harry Potter series, in which she has played Hermione since she was ten, with the final film out later this year.

The star – who cut her hair short to mark the end of life as Hermione – will fit her Lancome role around studies at Brown University in America.

Emma was being her usual stylish self on Friday night at a party at the Almada bar in London’s Mayfair in honour of Colin Firth and The King’s Speech, the runaway success of this year’s awards season, accompanied by movie mogul Harvey Weinstein.

Hollywood giant Weinstein produced the Oscar-nominated film which is tipped for BAFTA glory tonight.

The party continued well into the early hours, with Emma arriving at nearby Mahiki nightclub in the film chief’s Rolls Royce.

When they were accosted by eager autograph-hunters in between parties, Weinstein jumped in to chivalrously guide Emma through the crowd.

For Firth and many of his fellow revellers, who included flame-haired Mad Men star Christina Hendricks (in a stunning low-cut floral print silk gown), it was the start of a party-packed weekend in the run-up to tonight’s BAFTA Awards.

Taken by surprise: Emma is escorted through the crowd by Weinstein outside Mahiki in London