Odd that Facebook CEO Mark Zuckerberg didn’t think of this a few months ago, before his company went public with its all-male board. But after enduring attacks from women’s rights groups led by UltraViolet, the company today says that COO Sheryl Sandberg will join the exclusive club. “Sheryl has been my partner in running Facebook and has been central to our growth and success over the years,” Zuckerberg says. “Her understanding of our mission and long-term opportunity, and her experience both at Facebook and on public company boards makes her a natural fit for our board.” Sandberg, who has an MBA from Harvard, also is a director for Disney, Women for Women International, the Center for Global Development and V-Day. Facebook notes in an SEC filing that Sandberg will receive no additional pay for her board work. She received nearly $31M in compensation last year. Facebook’s board also includes Zuckerberg, investor Marc Andreessen, University of North Carolina president emeritus Erskine Bowles, Accell Partners’ James Breyer, Washington Post Co CEO Donald Graham, Netflix CEO Reed Hastings, and Founders Fund CEO Peter Thiel.