John Travolta and Olivia Newton-John apparently weren't the original picks to star in 'Grease'

Let's be honest, we all know John Travolta and Olivia Newton-John go together like "rama lama lama ka dinga da dinga dong."

Ever since the pair starred alongside each other in 1978's hit musical film Grease, they have held a special place in their fan's hearts.

But it turns out the duo weren't the initial choices to play high school sweethearts Danny and Sandy.

That's right. Grease could've had very different cast members!

According to Vanity Fair, Happy Days star Henry Winkler was originally offered the lead role of Danny Zuko but turned down the part for unknown reasons.

While both Carrie Fisher and Marie Osmond were among those considered to take on the role of Sandy Olsson.

So how did Newton-John end up landing the role?

READ MORE:
• John Travolta & Olivia Newton-John to reunite for 'Meet & Grease'
• John Travolta has re-enacted his iconic 'Grease' role of Danny Zuko with Jimmy Fallon

We have Travolta to thank for that!

The 67-year-old actor suggested the then country singer for the part, labelling her as "every guy's dream" and saying she was the "only one person that should play this role."

Reluctant to join the cast because a previous film of hers had flopped and she "was 29 and worried that I didn't look young enough" to portray a high school student, a screen test and with Travolta changed everything.

"John and I had great chemistry from the first time we met," she said of their first meeting.

We're glad they got the parts because we can't imagine anyone else playing Danny and Sandy!