It comes after the first photo of Gosling as Ken divided the internet when it was released by Warner Bros. earlier this month.
Some fans loved a bleach-blonde Gosling, while others compared him to Ellen DeGeneres and Freddie Prinze Jr.
Development of the film started way back in 2009, but finally kicked into gear last year when Gerwig signed on to direct.
Speaking to The Hollywood Reporter, she said she intended to subvert expectations.
"People immediately have an idea of, 'Oh, Margot is playing Barbie, I know what that is,' but our goal is to be like, 'Whatever you're thinking, we're going to give you something totally different — the thing you didn't know you wanted'," she said.
"If we can do all that and provoke a thoughtful conversation, then we're really firing on all cylinders."
