Cody Linley -- Cutie to Douchey on "DWTS"

The kid bro of "Dancing with the Stars" -- Cody Linley -- has gone from boy wonder to ... oh boy.

"Perhaps there was a touch of the diva there all the time," a show staffer tells the Chicago Sun-Times. "But it sure has come to the surface now -- in a major way. He's always whining about something or someone." As for reports of on-set boozing or happy hands, sources say it isn't so.