Always known as the style icon (I honestly can't remember naming one of her movies), Sienna Miller has a rocking look in a Temperly London blazer, sequined vest, skinny jeans, and woven slingbacks -- all while photographer Mario Testino casually holds onto her arm while in London.
This Nanette Lepore Discotheque Jacket is on sale for $297 ($495) is a great alternative to Sienna's luxe one. See the slideshow at Stylehive for more ways you can create this look!