Watson follows in the footsteps of Hollywood stars Kate Winslet and Penelope Cruz who fronted advertising campaigns for the French actors in the past.
The brunette beauty raved about her wonderful time in France, tweeting to her one million followers: 'Had such an remarkable time in Paris with Lancome!
'Soon to start filming Perks of Being a Wallflower - can't wait! Hope everyone's ok xx '
The new production will see Emma skirt away from the JK Rowling series with a more series role.
The story follows Charlie, a high-school freshman, who is struggling to