Will Smith has started the new year on a high - his movie I AM LEGEND has debuted atop the first U.K. box office chart of 2008. The film, which stars Smith as the only man left on earth after a virus wipes out the world's population, took $13.1 million (GBP6.55 million) in its opening week of release, eclipsing The Golden Compass, which is in second place with $4.38 million (GBP2.19 million). Last week's (ends28Dec07) most popular movie, Enchanted, slips down to number three with $4.3 million (GBP2.15 million), while St. Trinian's and Alvin and the Chipmunks round out the top five at fourth and fifth place respectively.