Acting isn't always about looking like you. It's often about the careful way in which a performer is able to carry themselves in body, mind and spirit in order to bring a fictional character to life - even if they happen to share little in the way of physical attributes. Sometimes, it goes even further - an actor is tasked with trying to convince audiences that they are another creature or strange being entirety, covered beneath layers of prosthetics and/or rendered using lots of CGI. It's not an easy feat... and not everyone is able to pull it off. Still, some of the best and most memorable cinematic characters of all-time don't look anything like the actors who play them: Anthony Daniels as C-3PO and Anthony Daniels as R2-D2, for example. Or how about Andy Serkis, an actor who deserves a whole raft of Oscars, as Gollum (and countless other motion capture characters)? Over the next few years, lots of very famous actors are set to light up the silver screen in a bunch of notable motion pictures, but - due to extensive make-up and prosthetics, computer-generated imagery or (in one notable case) a seriously crazy hairstyle you never expected to see on him - you probably won't recognise any of them. Here, then, are eight actors who will likely have you turning your head and wondering what you know them from when they first arrive on screen in these upcoming roles, starting with...