Randi Zuckerberg, Facebook’s director of marketing and sister of CEO and co-founder Mark Zuckerberg, has reportedly written her letter of resignation after six years with the company.

“My goal is to launch my own innovative programming and work with media companies to develop their programming in new, and more social ways,” she wrote in her letter to Facebook COO Sheryl Sandberg and Elliot Schrage, the VP of Global Communications, Marketing and Public Policy.

Gizmodo recently named Zuckerberg one of the dozen public relations people who secretly control the media, and Zuckerberg herself has made waves for her comments advocating against anonymity on the Internet.

In a resignation letter leaked to Kara Swisher at All Things Digital, Zuckerberg says that she is going to found her own company called R to Z Media.

In a statement, Facebook spokesman Andrew Noyes confirmed that Zuckerberg will leave the company. “We can confirm Randi has decided to leave Facebook to start her own company. We are all grateful for her important service,” he said in a statement.

The Washington Post Co.’s chairman and chief executive, Donald E. Graham, is a member of Facebook’s board of directors.

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