This sweet yellow party dress was first seen in the 1978 , where actress Didi Conn wore it as Frenchie. After that, the dress very likely went into rental stock, where it See Olivia Newton John's Best Outfits as Sandy in "Grease" PS Fashion Vintage 1950s Retro Rockabilly Midi Swing Flare Dress Polka Dots Women's Spring and Summer Masquerade Grease: The Best Fashion Moments And Where To Shop Them periodedits : Olivia Newton John as Sandy Olsson GREASE (1978)