Forty pounds. That's what Hirsch cut to play Christopher McCandless in Sean Penn's Into the Wild, and the dedication showed. The 2007 Krakauer adaptation was already going to be an event, but his performance turned it into a star-making role, earning him a SAG nomination and reframing what kind of actor he was going to be. Alpha Dog had given him a taste of recognition, and Speed Racer would crater spectacularly a year later. Into the Wild was the one that mattered, and the physical sacrifice was the argument.
In January 2015, he put a Paramount executive in a chokehold at a Sundance party and dragged her across a table while blackout drunk. The victim told the court she thought she was going to die. He pleaded guilty to a misdemeanor, served 15 days in jail, and kept working. The career damage was real but not fatal. He's been grinding through indie productions ever since, with Once Upon a Time in Hollywood (2019) and the Holocaust biopic Bau: Artist at War (2025) as the most visible recent entries. The Sundance incident defines his public profile more than any role he's taken since.
When Anton Yelchin died in 2016, Guillermo del Toro picked Hirsch to replace him as the lead voice in Netflix's Trollhunters, a job that quietly kept him employed through multiple spin-off series. Beyond acting, he released a music album in 2019, Mnemonic, and co-wrote a track with Mark Foster of Foster the People. He has a son named Valor, born 2013. He climbed Kilimanjaro in 2010 for a clean water charity. His resume outside of film reads less like a celebrity passion project and more like someone who genuinely can't sit still.