Zach Galifianakis told PEOPLE at the premiere of Disney's live-action Lilo & Stitch movie that he “doesn’t think there’s an audience” for another Hangover movie ...

Even so, it’s no fun to report that this one is so perfunctory, so deeply routine even as it struggles to feel unhinged. “The Hangover Part II” opens in theaters nationwide tomorrow.

As “The Hangover” turns 15, here are 15 things you may not have known about it: 1. The movie was inspired by a true story — a far less scandalous true story.