Greta Gerwig chatted with Access Hollywood's Zuri Hall about her new movie "Barbie" and breaks down her process behind making the highlyanticipated movie. Greta explains what made Margot Robbie a perfect Barbie and Ryan Gosling a perfect Ken for the flick, sharing, "There's a quality where they're finding the humor through the truth and through taking it seriously and they're never making fun of it and they're never standing outside of it." The director also spills on the big sleepover the cast had and reveals that Ryan sent over a bagpiper to the bash. "Barbie" hits theaters July 21.