Ever wondered just how you bring a zombie to life on the big screen?
Leah's been to meet the directors of ParaNorman, a new film all about a young boy who has to save his town from zombies.
The creators, Sam Fell and Chris Butler, explained how they brought the creepy characters to life.
Just like Wallace & Gromit, ParaNorman was made using a technique called stop-motion animation.
Movie clips courtesy of Universal Pictures