Greta Gerwig will make a 'Barbie' sequel if she finds the "undertow".The 40-year-old filmmaker is open to the idea of a follow-up after the success of her blockbuster = which starred Margot Robbie as the iconic Mattel doll - but it's not a given.Speaking at the West Hollywood Edition where she was honoured as one of Time magazine's Women of the Year, she said: "If I find the undertow, then we get it. If I don’t find an undertow, there’s no more.”She admitted: "It’s something that I loved making so much."And I loved the world that we built so much and all of the actors and the idea of getting to be with that group of people again is very exciting.”When it comes to making that decision, she wants to find the right connection to any particularly project she attaches herself to.