Sandy Olsson is a main protagonist in the 1978 film Grease, portrayed by Olivia Newton-John, who is originally from Sydney, Australia. She is the sweet, innocent girlfriend of Danny Zuko (John Travolta), with whom she had a summer romance before her family moved to Rydell High in California. Initially viewed as "too pure" for the Pink Ladies, Sandy undergoes a dramatic transformation into a leather-clad rebel to win Danny's respect, culminating in their reconciliation and iconic performance of "You're The One That I Want."

Get ready to bring the king of cool to your next cosplay or Halloween party with our Danny Zuko (Grease) costume guide.