Is one of very few film version of the fairytale where the dwarfs aren't played by actual dwarfs, but rather uses technical tricks to make the actors appear smaller in size. This caused some heavy criticism from little people in the trade, like actor Warwick Davis, who publicly compared this to if someone attempted to "black up" a white actor for a role as a black character.
Rather than using a wig, actor Sam Spruell's real strawberry blonde hair was cut & styled into Finn's distinctively unpleasant pageboy haircut for the duration of filming. It was bleached, cut, and his hairline was shaved back under the fringe. He describes it as "fine for the film, but horrible for civilian life."
Charlize Theron said that the hardest thing for her was walking in the dress she wore when she married King Magnus. The corset was incredibly uncomfortable and she was almost hunched over by the time she made it to the altar.
Director Rupert Sanders' insistence on realism in scale meant minimal miniature model work. The huge castle in the enchanted forest, for example, took 6 months to construct. The gigantic trebuchet, consisting of a metal skeleton interior and wooden exterior, weighed 6.5 tons.
Production of the film was temporarily shut down in October 2011 after Kristen Stewart tore a ligament in her thumb during an attack scene with the dwarves. Stewart also suffered from a foot injury sustained on set.