Will there be new cast members for Grey’s Anatomy Season 21? Yes. Sophia Bush has joined the cast for Season 21 in a recurring role. Bush will play Dr. Cass Beckman, a fun and messy trauma ...

called out the decision to let her and fellow castmates go after season 14. One Tree Hill alum Sophia Bush is set to appear on another long-running drama, as she confirmed her new role on Grey’s ...