Alexander Ludwig (born May 7, 1992) is a Canadian actor. He is known for his roles in The Hunger Games (2012), Grown Ups 2 (2013), and the Bad Boys sequels For Life (2020) and Ride or Die (2024).
Empowered by the enigmatic Professor's secret formula, high school student Robert Reynolds became a superhuman. After trouncing the school bully who had tormented him, Reynolds sewed together a costume and made his debut as the heroic Sentry.