The `Casino Royale` actress plays boarding school headmistress Miss G in the film - which sees her develop a fascination with one her teenage pupils, portrayed by Maria Valverde - and has admitted she doesn?t think their romantic liaison was portrayed as graphically as it should have been.

She said: "The love scene is soft - I wanted to go even further. In the book, she`s more sexual."

The 29-year-old star said filming the scene for the movie - which is based on Shiela Kohler`s 1999 novel - was easy as she and Maria, 22, had done so much practice.

She added to Wales Online: "Filming the love scene with Maria was fine - we didn`t do many takes. We?d rehearsed the day before, we knew exactly, clinically, what we were doing.

"I read the book many times, which was very helpful to understand Miss G`s obsession. She?s completely obsessed in the book. She?s quite manly, she?s wearing overalls and smoking cigars! She?s more sexual.

"In the film, she`s very delicate, sophisticated and feminine - it`s not the same."

Eva also spoke about her own school days, admitting they were less than happy.

She explained: "I was a very good student, but I was a perfectionist.

"I wanted to be perfect in French, English, maths, everything. It was too much. In my school, there was no real relationship with the teacher, and I was very shy, just eyeing the walls. You couldn`t bloom as an individual. So I decided to stop school one night, when I was 16.

"I said to my mother, `I can`t do this any more; I never go out, and I work all the time, until 10pm!"
sections: Celebrities