ET rides in style! Mark Steines takes you on a tour of the Qantas A380 airbus with some very special guests -- John Travolta and Olivia Newton-John!

The 'Grease' stars reunited for the very special launch of the world's biggest aircraft in history.

"You know Olivia today is co-hosting this flight with me, she is the head flight attendant today, and I'm the captain, right? Yes, it's a big thing, I'm excited."

Of course it's a natural fit: John is the company's ambassador at large, Qantas is an Australian airline -- and Olivia is one of the world's most famous Australians!

She's with her new husband John Easterling and they got a full tour of the airbus from the captain.

Get your own view of the most amazing airbus to date by checking out the video right now!