Keira Knightley: 'I'm Too Stupid to Know When I'm Getting Chatted Up'

Keira Knightley says she's too "stupid" to notice if she's being chatted up.

The 23-year-old actress -- who is currently dating actor Rupert Friend -- insists she is rarely approached by prospective lovers, and wouldn't even notice if she was.

In an interview with Britain's Radio 1, Keira said, "I never get chatted up. Honestly, I don't! And I'm so stupid that I wouldn't even realize if I was. I sometimes get a look but that's about it!"

Later in the interview, 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.

She revealed, "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!"