Why Barbie Trades Chanel For Birkenstock, According to the Movie's Costume Designer

PS: Did Robbie and Gosling specify any looks that made them feel most like Barbie and Ken?
JD: I think that they were pretty on board with all of them. When they signed up for the movie, they had an idea of what they were going to be doing, and each one came in and I had this long board with reference pictures and descriptions of the costumes. I talked them through it, and I talked to them about the idea of referencing the history of Mattel costumes from 1959 onwards. It was a lot to do, and it was always a discussion.