Warner Bros. has revealed the first trailer for the romance The Lucky One [LUCON] in a featurette intercut with interviews of the cast and author Nicholas Sparks, whose novel served as the source of adaptation. Zac Efron [ZEFRO] stars as a Marine serving in Iraq who finds a photograph of a woman he doesn't know which became his lucky charm. When he returns to the United States, he sets out to find her and predictably as the trailer reveals, falls in love with her. The Lucky One is set to open on April 20th.