We know Serena Williams and Meghan Markle are friends: after all, the tennis superstar received one of the coveted, exclusive invites to the Duchess of Sussex’s royal wedding this spring. But it turns out they’re the kind of pals who send each other supportive text messages regularly, too; this isn’t just a friendship for show. “We have known each other for a long time, but we really kind of are relying on each other right a lot recently,” Williams told Australian news outlet The Sunday Project in an interview.