Spencer Up In Smoke?

Well, we always knew he was full of hot air, but Star says Pratt's actually the "King of Weed!"

According to their sources, Spencer's got a years long habit that once included drugs like Xanax and Valium. Although he went to rehab to kick the pill habit, he still likes to take a toke every now again.

In fact, Star even spotted Speidi going into a medical marijuana facility just last month!

I know this is a totally shocking revelation for all the Spencer Pratt fans out there, (all one of them - Heidi), but if the Spencer we see on The Hills is the mellowed out Spencer, I'd hate to see him when he goes off the green!