The Lord of the Rings: The Two Towers (2002)
Andy Serkis' stunning performance as the wretched creature Gollum in Tolkien's on-screen masterpiece was recorded with the magic of motion capture technology. Each scene with him had to be recorded three times – once with him wearing a skin-tight white suit, once with him speaking off camera, and finally by himself in a motion capture studio. He's set to reprise the role in this year's The Hobbit: There and Back Again. Hopefully he hasn't forgotten how to do the voice, precious.