Born in Los Angeles, Duncan Joiner booked his first, open-call commercial at age three. It led to a Fox network pilot, a Lifetime Christmas movie, and a lead in the feature film "Some Kind of Beautiful" with Pierce Brosnan and Salma Hayek. After guest appearances on "Community" and "Jane the Virgin," and a recurring role on "We Bare Bears," he earned another lead in the feature film "The Disappointments Room" with Kate Beckinsale. Recurring roles on Fox's "Lethal Weapon," HBO's "Camping," Netflix's "Spirit Riding Free," and Paramount's "Waco" followed, before being cast as a lead in Steven Spielberg's "Amazing Stories." Most recently, he became a series regular on Amazon's "Tales from the Loop," where he was directed by Mark Romanek, Andrew Stanton, and Jodie Foster, and received critical praise for his honest, heartbreaking turn as Cole Willard.