As Kate White steps down as editor-in-chief of Cosmopolitan, the magazine made famous by the late Helen Gurley Brown will have a new editor in charge.

Joanna Coles was named the new editor at the top of the masthead; she’ll be leaving her job running the ship as editor-in-chief of Marie Claire, another Hearst title.

As per The New York Post, the change is happening pretty quickly. The November issue of Cosmo will close this week and then White will work on consulting projects for Hearst. On Monday Coles will begin her new job.

According to the newspaper, White’s departure is voluntary. The author of eight novels said, “I went to David Carey in January and told him I wanted to step down by the end of the year.”

“I wrote the book aware that I was going to be leaving,” she added. White’s latest book, I Shouldn’t Be Telling You This, will be released on September 18.