By Emily Sheridan for MailOnline
She's had a squeaky clean image since leaping to fame as Hermione Granger in the Harry Potter films.
However, that may be all set to change after Emma Watson admitted she has paid a subscription to an explicit website.
The actress, 25, admitted she paid to join OMGYES.com, a sexual pleasure research site, which aims to educate people on how to become better in bed.
Emma made the admission on Wednesday as she spoke to feminist icon Gloria Steinem at a talk in London.
During her on-stage interview at the Emmanuel Centre, Emma admitted she had been told about the website by a friend, which costs £40 to subscribe.
The English actress, who is dating actor Roberto Aguire, said: 'I wish it had been around longer. Definitely check it out.
'It's an expensive subscription but it's worth it.'
A representative for OMGYES.com told the New York Daily News: 'We got $4.6 million in funding and are doing that research. Instead of just making academic journal articles, we're making the findings practical, real, and experiential in the form of documentary interviews - both explicit and non-explicit - with real-life women, not actresses.'
The company said their users are both men and women.
Also at the sold-out talk, Emma admitted she used to hate her 'strong eyebrows' while growing up.
She said: 'I used to hate that I had strong eyebrows. As a nine-year-old I desperately wanted to pluck them and make them two thin lines.
'My mother desperately tried to tell me that they gave my face character, don't be ashamed.'
Emma also reflected on her breakthrough appearance playing Hermione in the Harry Potter films as she interviewed 81-year-old Steinem, who has just published her latest book, My Life On The Road, for a special event held by the How To Academy.
'I feel as though I spent a long time trying to pretend I was not like Hermione. And, of course, I was rather like Hermione. I've finally come to accept the fact.'