Julianne Hough posed with Olivia Newton-John backstage at Dancing With the Stars this week, giving Grease fans a look at character Sandra Dee both then and now.

Olivia Newton-John starred as Sandra Dee in the cult classic film version of Grease back in 1978. Julianne Hough takes on the role in an upcoming special–Grease: Live–to air on Fox in late January.

When Grease's original Sandy met the new Sandy: https://t.co/25U2YvrLJ4 pic.twitter.com/mxLemWYM1O

— Us Weekly (@usweekly) October 20, 2015

“Last night I got to meet @therealonj and it was one of the greatest moments ever. I’ve been a hopelessly devoted fan of hers (see what I did there??) since the very first time I saw Grease, and I am so honored to get to play Sandy, January 31st Live on Fox. You can read about my fangirl moment on juliannehough.com today! Link in profile,” Julianne Hough captioned the following photo on Instagram.

A photo posted by Julianne Hough (@juleshough) on Oct 20, 2015 at 8:27am PDT

Julianne Hough’s excitement over meeting Olivia Newton-John was no doubt palpable.

“I mean….. 🙂 ?? ( go to juliannehough.com to read more about meeting miss @therealonj last night on @dancingabc)” she captioned a photo collage.

A photo posted by Julianne Hough (@juleshough) on Oct 20, 2015 at 8:37am PDT

“I’m not nervous in a terrified way,” the Julianne Hough said of her role as Sandy during an interview with Us Weekly this summer. “I’m nervous in an excited way. I can’t wait. Those are some big shoes to fill so it’s exciting, but it’s also a little nerve-racking. It’s such an iconic role. It’s an iconic musical. I want to do it justice. But I’m very, very excited.”

Do you suppose Julianne Hough had the opportunity to get some pointers on her role from Olivia Newton-John? There’s nothing quite like going to the source when learning to play a character.