Zachary Wolfe Galligan is an American actor. He is best known for starring as Billy Peltzer in the comedy-horror films Gremlins (1984) and Gremlins 2: The New Batch (1990).

Gremlins is a 1984 American comedy horror film directed by Joe Dante, written by Chris Columbus, and starring Zach Galligan, Phoebe Cates, Hoyt Axton, Polly Holliday, and Frances Lee McCain, with Howie Mandel providing the voice of Gizmo, the main mogwai character. It draws on legends of folkloric mischievous creatures that cause malfunctions—"gremlins"—in the British Royal Air Force going back to World War II. The story follows young man Billy Peltzer, who receives a strange creature as a pet, which then spawns other creatures that transform into aggressive, imp-like monsters that wreak havoc on Billy's town during Christmas Eve.