12/05/2012 10:52 BST | Updated 22/05/2015 10:12 BST

Rooney Mara (AKA The Amazing Chameleon) Strikes Again!

We're still not quite over the shock of seeing how different Rooney Mara looks on the set of Bitter Pill in New York.

Although it's not a new phenomenon (we once lost a friendly wager over the fact that she'd made an appearance in The Social Network), we're still in awe of her ability to transform herself.

It's a rare gift. Emma Watson is a case in point. We've all seen the snaps of her toughing it up for The Bling Ring, but there's no denying it's our Em under the pink velour and water soluble (we hope) tattoos.

Rooney, on the other, always has us double-taking and/or questioning the photo captions as they land in our respective inboxes. And we love it. There's nothing quite like being kept on our toes.

Rooney Mara, the amazing chameleon! Rooney Mara onset in New York. Photo: PA

Oh, and Rooney's our latest style icon too. Check out her sartorial evolution in the gallery below.