James Gardiner is an American artist and voice actor based in Berlin, Germany, known for his long-standing association with the German-language adaptations of the Lilo & Stitch franchise. He has provided the German voice for the character Stitch across various installments of the series for over a decade.

His career encompasses both visual arts and performance. Gardiner studied communication design at the BTK University of Art & Design in Berlin and has worked as an illustrator and storyboard artist for major clients, including the United Nations, Universal Studios, Warner Brothers, and Netflix. Alongside this work, he has maintained a concurrent career in voice acting, specifically for The Walt Disney Company.

Gardiner's most prominent and consistent voice role is that of Stitch, the alien protagonist of the Lilo & Stitch franchise. His work includes dubbing the character in the 2005 direct-to-video animated film Lilo & Stitch 2: Stitch Has a Glitch. He also voiced Stitch in the 2025 live-action/CGI hybrid film Lilo & Stitch. This continued role as the official German voice of Stitch represents his most significant and defining achievement in voice acting.