Sandy Olsen is one of the main characters in Grease. Sandy and her family moved to America from Australia, after summer vacation. She and Michael Carrington (from Grease 2) are cousins. She is also the love interest of Danny Zuko. She is at first not a member of the Pink Ladies because Rizzo, the leader thinks she is too "pure". Sandy is portrayed by Olivia Newton-John.
Sandy is a very pretty girl, with blonde hair, blue eyes and fair skin. Throughout the majority of the movie, Sandy wears very feminine clothes, such as a skirt-and-sweater set that are always in light colors such as yellow, pink, etc. However, at the end of the movie and her makeover, Sandy decides to transition to the "grease" look in order to impress Danny. Her hair is teased and curled and she wears a black one-piece outfit which makes her look like she is wearing tight capris and a tight shirt which she ties together with a leather jacket.
Sandy is a very good-natured girl, who speaks kindly to everyone, and has a heart of gold. She moves to the wealthier part of town during the summer months of 1958, from Australia. After meeting and spending the summer with Danny and giving their goodbyes, Sandy's family decides to stay instead of returning to Australia, but Danny doesn't know that. Sandy befriends Frenchy and meets the Pink Ladies, Sandy joins the cheerleading squad which sparks up a relationship between her and a jock that doesn't get along with Danny or his friends. After forgiving Danny for a previous fight, Sandy realizes she must change in order to be a part of Danny's world (Meanwhile, Danny comes to the same conclusion and tries to change for Sandy). So after Frenchy gives Sandy a makeover to make her look more like a Greaser chick, she attends the Senior Carnival and finds Danny with a Lettermans jacket, but once he sees the new Sandy he goes back to his former self and him and Sandy are more madly in love than ever.
In the summer of 1958, local boy Danny Zuko and vacationing Sandy Olsen meet at the beach and fall in love. When the summer comes to an end, Sandy—who is going back to Australia—frets that they may never meet again, but Danny tells her that their love is "only the beginning".
The film moves to the start of the seniors' term at Rydell High School. After her parents decided not to return to Australia, Sandy enrolls at Rydell and befriends Frenchy. Oblivious to each other's presence at school, Danny and Sandy tell their respective groups the accounts of events during the pair's brief romance (Summer Nights).
Upon learning Danny was Sandy's summertime sweetheart, Rizzo arranged for the two to reunite, but Danny was forced to maintain his bad-boy attitude in front of his pals, upsetting Sandy - and that was Rizzo's plan, to humiliate both of them.
Later, Frenchy invited the girls to a pajama party, but Sandy fell ill from trying a cigarette and having a sip of imported `desert wine'. To top it off, she got her ear pierced by Frenchy, saw the blood [behind closed doors], and `BLEEAAH!!' After the T-Birds crashed the party and left with Rizzo, Sandy reflected on her feelings for Danny (Hopelessly Devoted to You).
Some time later, at a burger joint, Danny tried to apologize "It was me but it wasn't me"...etc, she rebuffed him - she was with Tom Chisum, whom Danny remarked he `could run circles around those jerks'. She gave him a figurative kick in the happy place when she replied, "I'll believe that when I see it."
Danny actually did that, finally choosing Track and Field. He saw Sandy with tom, and picked up speed jumping the hurdles, but he overdid it and took a header when jumping over a hurdle. She came running to him to see if he was all right, she still cared for him. He half-heartedly gave her the `silent treatment', but she tricked him into talking, Finally, and they decided to have another chance at being together. What about Tom??? `He can stag it!'
They attempted to go on a date at the Frosty Palace, but the Pink Ladies and T-Birds crashed it, with Rizzo and Kenickie having a pretty big (and messy) fall-out.
The school dance arrived, broadcast live on television, and Danny and Sandy came together. During the dance, a perhaps drunk Sonny cut in, pulling Sandy away from Danny. Vulgar seductress, Cha-Cha DiGregorio (who were once dated Danny), took that as her cue, and performed together to Hand Jive. Sandy left just before Danny and Cha-Cha won a dance-off.
Later, Danny tried (again) to make it up to Sandy by taking her to a drive-in theater. She went to be with him and watch the movie, but to a teen boy like Danny, drive-ins were for more than just perusing the latest theatrical releases. He was thinking of a different kind of `release'. He asked her to go steady, she said `yes', and declared that he truly respected her. He was after more than respect, and - his hormones overriding his genuine love for Sandy - made his move. After slamming the door on him - literally, she slammed it on his nether regions while it was apparently in full salute (ouch) - she fled, leaving Danny alone and hurt - emotionally this time (Sandy (Song).
She knew Rizzo looked down on her for being `too pure', but that didn't stop her from offering to help when it was rumored that Rizzo was `knocked up'. Rizzo initially balked at the offer, stating that she could take care of herself, and anybody else that came her way. Saddened, Sandy was about to leave, when Rizzo called to her, and sincerely thanked her.
Some time later, on the last day of school, the class celebrated their graduation at the carnival / fair on the school grounds. Danny had become a jock, but was shocked when Sandy appeared, dressed in leather, tight satin pants, her hair teased, a total nuclear bombshell, and she was seen smoking - just for that time. In song, the two admitted they loved each other and reunited (You're The One That I Want). The film ends with Danny and Sandy departing in the totally tricked-out Greased Lightning car together, which then took flight, and the pair waved goodbye to their friends (We Go Together).
After Grease, Sandy's cousin from Cambridge, England, Michael Carrington, enrolls in Rydell High School two years later. Danny and Sandy were married and had three children named Sydney, Ryan, and Nicky. Sydney was named after where Sandy lived in Australia, Ryan was partially named after Rydell and Nicky was partially named after Kenickie.