Alden Caleb Ehrenreich (/ˈɛrənraɪk/; born November 22, 1989) is an American actor. He began his career by appearing in the television series Supernatural (2005) and in Francis Ford Coppola's films Tetro (2009) and Twixt (2011). Following supporting roles in the 2013 films Blue Jasmine and Stoker, his breakthrough came in 2016 with a lead role in the Coen brothers' comedy Hail, Caesar!, for which he gained praise.

Ehrenreich played Han Solo in Solo: A Star Wars Story (2018) and starred in the dystopian television series Brave New World (2020). In 2023, he had starring roles in the comedy Cocaine Bear and the thriller Fair Play, and a supporting role in Christopher Nolan's biographical film Oppenheimer. In 2025, he had supporting roles in the superhero miniseries Ironheart as Zeke Stane, and in the horror film Weapons. In 2026, he made his Broadway debut in Becky Shaw, winning the Tony Award for Best Featured Actor in a Play.