AH-HA!!!
The Dark Lord's pot farmer (http://news.yahoo.com/s/ap/20090721/ap_on_en_mo/eu_britain_potter_actor)
All part of the plan to help Voldemort overthrow the Muggles! They'll be too stoned to stop him!
Sure he's not one of the most important characters in the film, but given how long the movies have been getting made even if he was getting a non-union background actors rate he'd have made a serious fuck ton of money by now. And he's growing it instead of just buying it? What the hell, is he high or someth... Oh riiiiiiiiiight...