The 'Noah' star, 23, said that she prefers to keep her personal life private, reported Daily Express.
"I don't date people who are famous, and I don't think it's fair that, all of a sudden, intimate details of their personal life are public as a direct result of me. I wish I could protect them," she said.
Even though the former 'Harry Potter' star is thankful for getting a break in movies at a young age, she feels it is often a burden on her career. Sometimes she finds it hard to be taken seriously as a mature actress.