Harry Potter star Emma Watson became more interested in the films as the franchise got "darker." The 21-year-old actress - who has played leading lady Hermione Granger in the movie series for the last 10 years - began to enjoy the films when it became more of a challenge for her to act in them.

"I mean obviously I went from being a child to being an adult. As the material got darker, it got more challenging. When that started happening, I started taking more of an interest."

The British star - who has returned to education and turned to a career in fashion alongside her film work as she has grown older - also admits she will miss her character in the movie more than she will miss anything else.

"I'm just going to miss being her, living in her world."