Later this fall, audiences will finally get to the know the woman who reportedly inspired The Devil Wears Prada and told Oprah Winfrey to lose weight.

For The September Issue, director R.J. Cutler got rare behind-the-scenes access of Anna Wintour doing what she’s famously known for. In the documentary, the Vogue editor-in-chief and her team work hard to create the magazine’s September issue, one of the fashion industry’s bibles. (The 2007 edition weighed in at over four pounds.)

September issue hits theaters on August 28.