Real fans would know that the Barbie promo actually started over a year ago — the day set leaks took over Twitter. The day we first saw Robbie and Gosling in their neon roller skate outfits.

"Margot and I marathoned through 50 or 60 outfits," Mukamal told PEOPLE at an event celebrating the release of their collaborative book 'Barbie: The World Tour' Hedy Phillips is the Senior Style ...