Zelda Williams (Teen Wolf), Alberto Frezza (Charlie’s Angels) and Eli Goree (The 100) have joined the cast of Freeform’s Dead Of Summer horror drama series. In addition, the network announced that series creators/executive producers Adam Horowitz and Edward Kitsis (Once Upon A Time) will direct the first episode. Williams, Frezza and Goree join previously announced cast members Mark Indelicato (Ugly Betty), Ronen Rubinstein (Orange Is The New Black) and Paulina Singer (Gotham), Deadline reports.

Set in the late 1980s, school is out for the summer and a sun-drenched season of firsts beckons the counselors at Camp Clearwater, a seemingly idyllic Midwestern summer camp, including first loves, first kisses—and first kills. Clearwater’s dark, ancient mythology awakens, and what was supposed to be a summer of fun soon turns into one of unforgettable scares and evil at every turn. Production will begin in March.

Williams will play a counselor at Camp Clearwater who is a mysterious loner with no interest in bonding with the rest of the group. Frezza is Deputy Garrett Sykes, a young deputy who has ties to Camp Clearwater and who grows immediately suspicious when events at the camp don’t add up. Goree will play Joel, an aspiring filmmaker who is returning to Camp Clearwater as a counselor and begins to buy into the idea that something weird is happening.

Dead of Summer will be produced by ABC Signature Studios and Kitsis/Horowitz. Adam Horowitz, Edward Kitsis and Ian Goldberg will write and executive-produce the series.