The Lucky One star Zac Efron graces the May cover of Men 's Health ( on newsstands April 17 ) .
The Lucky One star Zac Efron opens up about his transformation from a Disney Channel all - star to a leading man with a Marine 's work ethic .
The Lucky One star Zac Efron graces the May cover of Men 's Health ( on newsstands April 17 ) and opens up about his transformation from a Disney Channel all - star to a leading man with a Marine 's work ethic .