'Barbie’ Director Greta Gerwig Reacts to Rumor of a Ken Spinoff for Ryan Gosling (Exclusive)

'Barbie’ director Greta Gerwig chats with ET's Will Marfuggi on the pink carpet at the 'Barbie' world premiere in Los Angeles. Gerwig opens up about the fun-loving competition between the Barbies and the Kens on set, and she reacts to rumors of a possible spinoff starring Ryan Gosling. 'Barbie' steps into theaters on July 21.