"Will Smith's status as one of the world's biggest box office stars has never obscured his strengths as one of American cinema's finest actors, a point not lost on Oscar voters who've nominated Smith as Best Actor twice, for 'Ali' and 'The Pursuit of Happyness.' His penchant for taking on tough thesping assignments won't surprise those who've paid attention to Smith's range, which was vividly on display from the beginning of his career. While still cutting his comedic teeth on the breakout TV hit 'Fresh Prince of Bel Air,' 25 years ago, Smith was stepping up to acting challenges in dramas such as 'Where The Day Takes You' and the complex central role of Paul in the film version of John Guare's Pulitzer Prize-nominated 'Six Degrees of Separation.' With this year's 'Concussion' Smith rings true as real life Dr. Bennet Omalu, the David to the National Football League's Goliath, a role very much in the tradition of James Stewart's famed 'Mr. Smith' and Gregory Peck's Atticus Finch.