Jeff Conaway

Jeffrey Charles William Michael Conaway was an American actor. He portrayed Kenickie in the film Grease and had roles in three television series: struggling actor Bobby Wheeler in Taxi (1978–1982), Prince Erik Greystone in Wizards and Warriors, and security officer Zack Allan on Babylon 5. Conaway was featured in the first and second seasons of the reality television series Celebrity Rehab with Dr. Drew.