The 38 year old has starred in a string of scary films, including Brad Anderson slasher Session 9 and 2000 thriller American Psycho.
But Lucas admits he is too terrified to sit through any gory scenes and won't even watch his own work.
He tells the New York Daily News, "I won't see scary movies. I've been in them and then I've been like, 'Whoa, this is too scary for me!' I guess I've held on to those little childhood moments - when you're in the dark and there's a rattle outside your house and you're thinking there's a monster under your bed."