Jeff Conaway was already a Grease alum. He played the role of Danny Zuko on Broadway (along with Richard Gere and Patrick Swayze!) but got the sidekick role of Kenickie in the film.
John Travolta as Danny Zuko | Here’s What The Cast Of “Grease” Looks Like Now. HAHAHA not one of them aged gracefully...
Uggghh I just wanna go back in time and be his Sandy!!! Lol.
smirk animated GIF
Gotta love Danny Zuko
john travolta <3 (back in the day)
But sloppy seconds aint my style. - John Travolta, Grease, 1978