FILE - In this March 21, 2010 file photo, actor Sam Worthington, from 'Clash of the Titans', poses for a portrait in Beverly Hills, Calif. (AP Photo/Kristian Dowling, file)AP – Sam Worthington has gone from part-human, part-alien warrior of the distant future in „Avatar” to half-human, half-god warrior of the ancient past in „Clash of the Titans.”