Depends on who you ask, we all have our own perception of what is "too skinny", personally I wouldn't want to be that thin, but for some people that is the ideal size. Keira has been that thin since bend it like beckham so I imagine that is just how she looks, she's accepting of herself and that is all that matters.

I think she is naturally like that, unlike other celebrities like Kate Bosworth.

She looks good. I agree with ellegirlstyle. It's her body type. I'm naturally thin too, and I'm sure some people would say I'm too skinny but I just don't put on weight easily.

Anorexia runs in her family, she said in an interview. But I don't think it's a issue with her,she's just lean/fit.

SHE'S THIN, BUT NOT EXTREME LIKE BOSWORTH... SHE'S A WRECK!

she's skinny,but it might be natural like ellegirl says!

She was looking good back when the first pirates came out, but she's lost more weight since then and it's too thin in my opinion. In Atonement, when she's in that green dress, you can see all her bones in her back. That's not healthy!