The 22-year-old actress says she used to hate wearing colour on her lips but now can't go out without wearing colour on her lips, reported Contactmusic.
"When I was younger, I hated the idea of wearing lipstick. Then, in the past two to three years, I've been wearing lots of different colours - my favourite daytime shade is coral," she said.
Watson said that she takes the time to exfoliate her lips for smooth colour application and has figured out the best ways to make her lipstick last.
"To get a really intense look, blot off the first layer and reapply your colour. Use nude lipliner to get the perfect cupid's bow and exfoliate your lips with a toothbrush. They'll look great," she added.