REDWOOD CITY, California — Entrepreneur, tennis champion and philanthropist, Serena Williams, has added another title to her resume, as she joins Poshmark’s board of directors.

“I’m really excited to join Poshmark because it really speaks to my core values,” Williams said in a video announcing the news. “They really believe in so many different aspects of my life that I am not only living but I’m also preaching.”

Poshmark, founded in 2011, is the largest social commerce marketplace for fashion where anyone can buy, sell and share their personal style. Williams is the first woman to join the board.

Manish Chandra, founder and CEO of Poshmark, said in a press release, “Poshmark was built by a community of strong, independent women just like Serena Williams. As both our company and community continue to grow, it’s important that we bring smart and diverse new voices to the table, and we couldn’t be more thrilled about what the future holds with Serena in our corner.”

Just last year, the company announced for the first time that its sellers have generated $1 billion in sales.