Emma Watson gets excited by lie-ins at university.

The 'Harry Potter' actress - who is currently studying at Brown University in New England - admitted she found the first few months of academia "liberating" in comparison to the gruelling schedules she had to adhere to while filming the wizard franchise.

She said: "It was so liberating. I'd be smiling to myself and friends would say, 'Emma, what's wrong?' and I'd say, 'I'm just happy'. I take pleasure in the smallest thinks. Like, I'm going to wake up at 10 o'clock if I want to. Or, I'm going to eat a sandwich now.

"I have such a structure when I'm working on 'Potter'. I get told what time I get picked up. I get told what time I can eat, when I have time to go to the bathroom. Every single second of my day is not in my power."

The 20-year-old star also revealed there were times when filming arduous outdoor scenes for the latest movie in the 'Harry Potter' franchise was a "horrible" experience.

Emma added to Entertainment Weekly magazine: "I hate to sound whiny, but it's horrible. This has definitely been the most intense, gruelling period of film-making I have ever done."