90210 can't get the real Dylan McKay, so what do they do? Create a character that fits his description and then name him after his portrayer, Luke Perry. Duh. Producers are casting the role of Luke, an impulsive, sexy, charismatic, mysterious bad boy who differs from every other guy on the show in one key way: He's not a total pretty boy.
http://ausiellofiles.ew.com/2008/10/casting-scoop-1.html?xid=rss-ausiellofiles-Casting%20Scoops: