"When I heard I'd got the part of Hermione, my mother said to me it was very important to keep the friends I'd made already," she says. "She told me that in the future it would be important to know people liked me for myself and not because of my career. ... Now I know exactly what she means."

Dating is also hard, as any boy she spends time with is immediately called boyfriend. Her younger brother, Alexander, is "about the only bloke I can go out with and not cause a stir," she says.