Sienna Miller stepped out in New York City yesterday to walk her adorable little dog. Dressed casually in a hoodie, cropped trousers and a leather jacket, she matched her socks to the stripes on her top! Sienna's making NYC her home as she stars in Broadway play After Miss Julie, and there's been rumours that she's been seeing her ex Jude Law, who's also starring on Broadway in Hamlet. Do you believe the rumours?

Source: Getty