The fabulous Julianne Moore is InStyle's cover girl this October -- for the fourth time! Moore has previously appeared on our cover in March 2011, March 2006, and April 2004. With her film resume always growing and a successful line of children's books under her belt, the star has come a long way since we first interviewed her. "I feel very much in the middle of my life," she said. "Being in a relationship for 17 years, having kids who are not babies anymore, living in the house we want to live in, and enjoying the work I do." Watch the video above to go behind-the-scenes at her shoot, where she talks about her favorite outfit from her feature, her biggest wardrobe splurges, and more. Then read more about Julianne in InStyle's October issue, on newsstands Friday, September 20!