Emma Watson

The 'Harry Potter' star has a strict policy of refusing to take selfies with fans and admits that she imposed it because of concerns about her own personal safety.

Emma told Vanity Fair: "For me, it's the difference between being able to have a life and not.

"If someone takes a photograph and posts it, within two seconds they've created a marker of exactly where I am within 10 metres. They can see what I'm wearing and who I'm with. I just can't give that tracking data."