There's no specific information on precisely what they are shooting, but an official press release from Disney has announced that Pixar's John Carter of Mars movie has begun principal photography in London. I have high hopes for this movie given the involvement in Pixar, though this is a major departure for the studio, marking it's first foray into live action. Can the Pixar magic transfer from animation to live action? Hopefully in a few months we'll start to see some images emerge and start to make that judgement, but there's certainly plenty of talent behind and in front of the lens. In related news, Spy Kids' Daryl Sabara and There Will Be Blood's Ciaran Hinds have joined the cast, with Sabara playing Edgar Rice Burroughs.