Bloopers & Behind The Scenes on Instagram: "Creating the character of Hagrid in the Harry Potter films was a clever mix of practical effects and movie magic. Actor Robbie Coltrane played Hagrid, but to make him appear half-giant on screen, filmmakers used several techniques. For many scenes, Coltrane was filmed normally while the sets around him were built smaller so he looked enormous by comparison. In wider shots, a taller body double named Martin Bayfield was used wearing an oversized Hagrid