Sports legend Serena Williams will embark on the thrills of motherhood with her sister by her side.

ESPN spoke briefly to sister Venus Williams before her third-round match at the U.S. Open about the new addition to her family. “I’m super excited,” Williams said of her aunt status. “Words can’t describe.”

And what a beautiful year it has been…more to come! @elevenbyvenus @serenawilliams

A post shared by Venus Williams (@venuswilliams) on

Thanks to the universe, Serena’s daughter arrived at the wake of the U.S. Open, a tournament the athlete has won six times (1999, 2002, 2008, 2012, 2013, 2014).