Julianne Hough has come a long way since starring in Rock of Ages in 2012. Aside from just advancing her acting career (movie star status, much?), her look has totally changed too.

The former Dancing With the Stars pro took to Instagram, posting a throwback photo of herself rocking super long hair while posing with the Rock of Ages cast. She wrote, "#tbt to Rock of Ages rehearsal with @adamshankman @mmraw #joeyp #teddy #missmylonghair."

Hey, we think this blond bombshell looks glamorous no matter what length her hair is, but we must admit, those long locks are pretty hot!

Check out the flashback photo of Julianne below and then let us know which hairdo you prefer in the comments!

Catch the Dancing With the Stars Season 17 premiere on Monday, September 16, 2013 at 8 p.m. ET/PT on ABC.