Just a note to set the record straight about Rupert Grint's Keep Calm and Carry On T-Shirt he wore to the Paris Premiere and on TV to promote the new Potter film....
Yes No Maybe (www.yesnomaybe.co.uk) is the fashion label who produced the Keep Calm and Carry On T-Shirt Rupert wore to the Paris Premiere, not the site mentioned in the answer.
Yes No Maybe was the first to put the Keep Calm and Carry On slogan on a shirt, and they had been producing this T-Shirt for well over a year before the other site was launched. It continues to be a favourite at stockists throughout the UK and is one of YNM's signature designs.
http://yesnomaybe.co.uk/ProductDetails.aspx?se x=M&typeCode=T&designCode=KC&printColourCode=W &productColourCode=Bk
In the photographs of Rupert, the authentic Yes No Maybe red-on-white front label is clearly visible on the lower edge of his T-Shirt.
Have a look at Rupert in his T-Shirt here:
http://www.ewonline.net/photos/photos/userpics /10001/016.jpg
http://www.ewonline.net/photos/photos/userpics /10001/009.jpg
and here
http://editorial.gettyimages.com/Search/Search .aspx?EventId=74990885