Katie Holmes los angeles film festival premiere screening don't be afraid of the dark

Katie Holmes los angeles film festival premiere screening don't be afraid of the dark

Katie Holmes hit up the LA premiere of her new horror flick Don't Be Afraid Of The Dark Sunday night, and she was all smiles, despite some drama at the screening!

Apparently the theater's emergency alarm system went off during the movie's LA Film Festival premiere ... scary! Luckily, it was a false alarm.

We're loving Katie's look -- her dress is too cute and her body looks great!