Emma Watson finds drinking alcohol "disrespectful".
The 20-year-old Harry Potter star, who is currently studying at Brown University in the United States, admitted she avoided drinking during her first year of studying, as while she was legally old enough to consume alcohol in the United Kingdom, she felt it would be wrong to flout American laws.
"There's no point getting drunk when you've got 10 hours on set the next day, and I didn't drink last year at Brown either because I was underage in America, and it would have been disrespectful."
Instead, the British actress prefers to let her hair down "behind closed doors" with people she can trust.
Emma added to Britain's Vogue magazine: "It's not worth it. You can imagine the fallout. I do have two or three people I can let my hair down with, behind closed doors.
"Yes, I'm straight and boring. But I realised at a very young age that I was responsible for myself."