Weird actor interactions?

Here’s my intro into the G+G forums. The craziest actor/actress I ever met was Allison Mack aka Chloe from the show Smallville. She seemed nice at first though there was something a bit off with her in our conversation. She mentioned a “special” group of friends she was close to in NY that I never could’ve imagined was probably the NXIVM cult. Nothing ignited red flags at the time but ultimately our interaction was a bit awkward. Awkward yet she still seemed like a sweetheart. It wasn’t until a year later that I would learn how crazy she was behind the scenes. Quite the lesson for me that even the nicest of people might not be what they seem. I’ve met other people who were weird too but I’m wondering if anyone else has met a TV/movie personality that were a bit of an oddball in person?