Alexander Ludwig is a Canadian actor and musician who was born on May 7, 1992. He began acting like a toddler and rose to prominence as a teenager after appearing in the films The Seeker: The Dark Is Rising (2007) and Race to Witch Mountain (2007). (2009). He rose to prominence after playing Cato in The Hunger Games (2012). He's also renowned for his supporting performances in Lone Survivor (2013) and Bad Boys for Life as Shane Patton and Dorn, respectively (2020). In the History Channel series Vikings (2014–2020), he played Bjorn.