<Ul> <Li> Eve Arden as Principal Greta McGee, who shows discomfort at the goings - on at Rydell High . </Li> <Li> Dody Goodman as Secretary Blanche Hodel, who enjoys even the wilder antics at the school . </Li> <Li> Sid Caesar as Coach Vince Calhoun, the tough - talking gym teacher and coach of all the school's perennially losing sports teams </Li> <Li> Eddie Deezen as Eugene Felsnick, the class nerd </Li> <Li> Susan Buckner as Patty Simcox, the head cheerleader and a rival for Danny's affections </Li> <Li> Lorenzo Lamas as Tom Chisum, a popular jock who competes for Sandy's affections </Li> <Li> Dennis C. Stewart as Leo "Craterface" Balmudo, head of the Scorpions, a rival greaser gang </Li> <Li> Annette Charles as Charlene "Cha - Cha" DiGregorio, Leo's girlfriend </Li> <Li> Joan Blondell as Vi, a waitress at the Frosty Palace </Li> <Li> Ellen Travolta as Waitress </Li> <Li> Frankie Avalon as Teen Angel </Li> <Li> Edd Byrnes as Vince Fontaine, on - air personality at KZAZ radio and television </Li> <Li> Sha - Na - Na as Johnny Casino and the Gamblers, a rock and roll band </Li> <Li> Alice Ghostley as Mrs. Murdock, a rogue auto shop teacher who helps build Greased Lightnin' for the T - Birds </Li> <Li> Darrell Zwerling as Mr. Lynch </Li> <Li> Dick Patterson as Mr. Rudie </Li> <Li> Fannie Flagg as Nurse Wilkins </Li> <Li> Michael Biehn (uncredited) as Mike, a jock at Rydell high </Li> </Ul> <Li> Eve Arden as Principal Greta McGee, who shows discomfort at the goings - on at Rydell High . </Li> <Li> Dody Goodman as Secretary Blanche Hodel, who enjoys even the wilder antics at the school . </Li> <Li> Sid Caesar as Coach Vince Calhoun, the tough - talking gym teacher and coach of all the school's perennially losing sports teams </Li>

What is the theme of grease the movie