Here is a playbill from Grease hand signed by the cast of the 2007 - 2009 production which was at the Brooks Atkinson Theatre.  This is donated by Josh Franklin, who was part of the "Grease" cast.

A real classic ... Grease is about Danny and Sandy who fall for each other during a carefree summer fling.  But when the school year begins, Danny is torn between his feelings for good-girl Sandy and his image with the T-Birds and the Pink Ladies.

***  Come hear Josh Franklin sing at TUNES IN TIMES SQUARE  ***