Often likened to River Phoenix and Leonardo DiCaprio for his boyish looks and his penchant for intense, thoughtful young adult characters, Emile Hirsch began his career as a teen guest in television dramas before earning a solid dramatic reputation in indie films. Following an acclaimed starring role in “The Dangerous Lives of Altar Boys” (2002), Hirsch brought believable coming-of-age complexity and considerable charisma to the fact-based crime drama “Alpha Dog” (2007) and turned in an astounding performance as a peripatetic young idealist in Sean Penn’s “Into the Wild” (2007), for which he