Lionsgate has released the first official trailer to director Adam Wingard and writer Simon Barrett’s (A Horrible Place to Die) eagerly anticipated home-invasion frightener You’re Next, starring Aussie newcomer Sharni Vinson in her most terrifying role since Step Up 3-D.

You’re Next follows the Davison family as they’re attacked in their vacation home by a group of sadistic murderers armed with an array of shit-that’s-gonna-hurt-tools. The family’s only hope lies in their eldest son’s super-hot girlfriend (Vinson) whose mysterious past has made her hard to kill like Steven Seagal.

Costars include Wendy Glenn (11-11-11), Amy Seimetz (Bitter Feast), Nick Tucci (Undocumented), AJ Bowen (The Signal), Joe Swanberg (Horrible Way to Die), indie horror directors Ti West (The Innkeepers) and Calvin Reeder (The Oregonian), and old-school scream queen Barbara Crampton.

You’re Next on Aug. 23.

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