Taissa Farmiga, Evan Peters Taissa Farmiga, Evan Peters

Taissa Farmiga and Evan Peters have joined the cast of Ryan Murphy's American Horror Story, TVGuide.com has confirmed.

Dylan McDermott to star in Ryan Murphy's American Horror Story

Vera Farmiga's younger sister will play Violet, the troubled daughter of

Ben and Vivien Harmon (Dylan McDermott and Connie Britton, respectively) in the FX drama pilot. Violet forms a bond with one of Ben's disturbed therapy patients, Tate, played by Invasion's Peters.

As previously announced, Oscar-winner Jessica Lange will play their prying neighbor, while True Blood's Denis O'Hare will play a mysterious burn victim named Larry.

Ryan Murphy snags Friday Night Lights' Connie Britton for FX pilot

 American Horror Story is the brainchild of Murphy and Brad Falchuk, co-creator-executive producers of Fox's Glee and previously FX's Nip/Tuck. Murphy will direct the pilot. Glee's Dante Di Loreto will also executive-produce.

The news was first reported by TVLine.com.