As much as actors might hate sitting in a makeup chair for six hours a day, the transformative quality of a strong makeup job really does speak for itself.
It can lend a greater air of physicality to an actor's performance and, above all else, allow them to disappear into their character entirely, to the extent that audiences might not even realise who it actually is underneath.
These actors all underwent mind-bogglingly impressive transformations courtesy of state-of-the-art movie makeup, but still, can you look past the layers of slap to recognise the name performer underneath?
From beautiful actresses who shed their glamour for a more gritty "natural" look, to performers who switched gender, aged themselves up, and otherwise looked as far from their typical selves as possible, you'll need a real eye for faces to get 100% on this quiz.
But don't worry if you're stumped by the incredible makeup work - the answers are at the end as ever, so good luck!