Castle Rock star joins the cast of The Walking Dead

Castle Rock’s Cassady McClincy is joining the cast of AMC’s The Walking Dead.

McClincy will play Lydia, daughter of the Whisperers’ leader, Alpha. The Whisperers have been confirmed to be this season’s new main antagonist group. Actress Samantha Morton has been cast in the role of Alpha.

In the comics, the Whisperers are a mysterious group of survivors who disguise themselves with roamer skin to blend in and not get noticed, and in the series are formidable adversaries of Rick Grimes (Andrew Lincoln) and his allies.

The Walking Dead returns this October on AMC.