Knightley signs off Twitter

Actress Keira Knightley says her 12 hours on Twitter made her feel like a lonely girl in a school playground.

"It made me feel a little bit like being in a school playground and not being popular and standing on the sidelines kind of going, 'Argh'." - Actress Keira Knightley on creating and promptly deleting her Twitter account after only 12 hours.