Theron plays a lycra-clad superheroine in the forthcoming movie and, keen to make her movements as fluid as possible, decided to study the slithery action of the gecko.
Movie stunt coordinator CHARLIE CROUGHWELL says, "There's a scene were Charlize runs on all fours and her belly's only three or four inches off the ground, so we watched National Geographic videos of geckos to analyse their movements."
Theron adds, "I'm from Africa. I know all about geckos. I used to play 'Alcatraz' with them in my yard."