The Williams sisters are getting back into the producing game.

Serena and Venus Williams, along with their sister Isha Price, have joined documentary Between Starshine and Clay: The Hidden Diary of Diahann Carroll as executive producers alongside Katy Barksdale and Valerie Gamache. The project, currently in production, is being co-directed by Susanne Rostock and Carroll’s daughter, Suzanne Kay, who are producing alongside Color Farm Media’s Erika Alexander and Ben Arnon.