Keira Knightley once joined Twitter for 12 hours.
The notoriously private 'Anna Karenina' star once signed up for the social media site – where users swap messages in 140 characters or less in a mass conversation – anonymously, but was unimpressed and quickly deleted her account.
She told the UK edition of Harper's Bazaar magazine: “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!'”
Knightley, 28, also said she doesn’t believe being so private adds to a public view of her being a little snooty.
She added: “No, I think that's fine ... I like being private. I haven't asked a lot of the actresses who I really admire, 'How do you do it?' because I don't want to know. Maybe I'm childish in that way; I just don't want to know about your life."
Knightley – married to keyboard player James Righton – has also said she is glad feminism is no longer a "dirty word" in Hollywood.
She said: "I think it's great that the discussions are finally being allowed to be had, as opposed to anybody mentioning feminism and everybody going, 'Oh, f***ing shut up'.
"Somehow, it became a dirty word. I thought it was really weird for a long time, and I think it's great we're coming out of that."