Or maybe even as the delightful Mr Tumnus in The Chronicles of Narnia (2005)...
Well prepare to see a whole other side to him (or 23) in his new movie, Split, about a kidnapper with multiple personality syndrome.
In this frankly terrifying trailer, he kidnaps three girls and is seen with a psychologist who is in awe of his case, saying he has 23 personalities living inside his body. We get a glimpse of some - a 'nine-year-old' boy called Hedwig, a wild man he calls 'The Beast', and a seemingly middle-aged woman.
Creeped out yet? Watch the trailer if you're prepared for a scare: