Lizzy Caplan, Garrett Hedlund & More Join Season 2 of 'Castle Rock'

Lizzy Caplan and Garrett Hedlund are joining the cast of Castle Rock!

The Masters of Sex actress and the Triple Frontier actor are set to appear in the upcoming season of the Hulu horror series from J.J. Abrams and Stephen King, Deadline reported on Wednesday (March 20).

PHOTOS: Check out the latest pics of Lizzy Caplan

Tim Robbins and Elsie Fisher are also joining the cast.

Yusra Warsama, Barkhad Abdi and Matthew Alan are also joining as series regulars.

In Season 2 of the series, a feud between warring clans comes to a boil when budding psychopath Annie Wilkes (Caplan), Stephen King’s nurse from hell, gets waylaid in Castle Rock.

Lizzy‘s Annie Wilkes is a nurse and superfan battling to overcome mental health issues. Tim is Reginald “Pop” Merrill, The Patriarch of Stephen King’s iconic crime family, who is dying of cancer and at a reckoning with his family.

Garrett plays John “Ace” Merril, Castle Rock’s legendary bully, taking over his uncle Pop’s businesses and threatening a fragile peace with nearby Jerusalem’s Lot.

Elsie plays Joy, Annie’s home-schooled teenage daughter, who is starting to have questions about her mother’s sanity. Yusra plays Dr. Nadia Omar, the Harvard-trained Somali medical director of a rural hospital in Jerusalem’s Lot. Barkhad will play Abdi Omar, the tough, older brother of Nadia, who leads the charge to build a Somali community center that will deepen the roots of his people in Maine.

Finally, Matthew plays Chris Merrill, Pop’s nephew and Ace’s brother, who struggles to keep peace between the Merrills and the Somali community.