Karen Gillan Reveals Video Of Her Shaving Head For GUARDIANS OF THE GALAXY When you think of beautiful redheads, it's likely that former Doctor Who star Karen Gillan will come to mind almost instantly. It was a shock then when the Scottish actress revealed at last year's San Diego Comic-Con that she had shaved her head for the role of Nebula in Marvel and James Gunn's Guardians of the Galaxy, and a video of her doing just that has now found its way online.  You have to imagine that Gillan could have got away with NOT shaving her head for the role, but the fact that she was willing to is pretty damn cool.