Tate Britain unveiled 12 poster designs for the London 2012 Olympic and Paralympic Games today from artists including Tracey Emin, Michael Craig-Martin, Sarah Morris, Rachel Whiteread and Chris Ofili. You can buy them on London2012.com and they'll also be on display at Tate Britain during the Festival of London next summer. Check out the designs in the gallery above. Those birds make us a little bit misty!  [Via Phaidon]