Oscar O'Shea was an American character actor, primarily active during the 1930s and 1940s. He began his career in theater before moving to Hollywood, where he specialized in portraying authoritative and often gruff but kind-hearted figures, such as judges, mayors, and grandfathers. His most famous and universally recognized role is that of Judge Henry X. Harper in the Christmas classic *Miracle on 34th Street* (1947), whose final ruling validates the existence of Santa Claus. His filmography includes notable collaborations with director Frank Capra, for whom he acted in films such as *You Can't Take It with You* (1938) and *Mr. Smith Goes to Washington* (1939). Although he did not receive any major awards, his consistent presence and the memorability of his supporting roles made him an iconic face of Hollywood's Golden Age, appreciated for his ability to infuse warmth and humanity into his characters.