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Emma Watson has won a two-year contract worth £3 million (NZ$7.8 million) to promote Chanel's Coco Mademoiselle perfume.
The 18-year-old actress, who plays Hermione Granger in the Harry Potter movies, will take over from fellow British star Keira Knightley, 23, when her contract ends this summer.
A source said: "Emma has been excitedly telling friends that she is going to be replacing Keira."
Watson landed the deal with the French fashion house after signing up with top modelling agency Storm in an attempt to branch out from acting.
Chanel has been preparing Watson for the new role by dressing her for film premieres and parties.
A source said: "She has been slowly integrated into the Chanel brand. Once it became clear she is growing into a beautiful young woman and wears the Chanel brand so elegantly, they had to sign her up.
"Chanel realises it is important to target a young audience."
Bosses at Warner Bros - who make the Harry Potter films - have given the deal their blessing.
- BANG! SHOWBIZ
