Keira Knightley's love snub

Keira Knightley says she never gets asked out on a date.

The 23-year-old actress - who is dating her 'Pride and Prejudice' co-star Rupert Friend - insists she is never approached by

prospective lovers, and wouldn't even notice if she was.

She said: "I never get chatted up. Honestly, I don't! And I'm so stupid that I wouldn't even realise if I was. I sometimes get a

look but that's about it!"

Later in an interview with BBC Radio 1, Keira's 'Edge of Love' co-star Sienna Miller - who stars with her in the new biopic of

Welsh poet Dylan Thomas - revealed she threw her across a room while shooting the movie.

Sienna said: "I was filming this scene where I was on top of Matthew Rhys, who played Dylan Thomas, and Keira had to come

and pull me off. But she literally ended up throwing me halfway across the room!"

Keira added: "I just don't know my own strength!"