20+ Unbelievable Secrets The Producers Of “Grease” Hid From Fans

Frankie Valli Sang “Grease”

The title song, “Grease,” which can be heard during the opening credits of the movie was sung by Frankie Valli.

Jeff Conaway Was Taller Than He Seemed

Because Jeff Conaway was taller than John Travolta, Kenickie was often slouching when filming so that the lead actor of the movie seemed taller.