Star Wars the Force Awakens included a huge number of cameos from the likes of Daniel Craig and even Bill Hader, who helped to create the voice for standout star BB-8.
But one fellow who had an even bigger, and very much hidden, role was uber nerd Simon Pegg. He's a long time friend of director J.J. Abrams, having worked on two Star Trek films together, and was on set as the character of Unkar Plutt - that's the large alien who is mean to Daisy Ridley's Rey at the start.
In case you didn't quite believe it was Pegg, though the voice sounded a little like him, here's a glimpse behind the makeup.
It's great to see how many practical effects were used in the film, and also scary to imagine how hot it was inside there shooting in a desert!