A24 premieres Adam Wingard's 'Onslaught' in Los Angeles, opens September 4

A24's slasher "Onslaught," directed by Adam Wingard from Simon Barrett's screenplay, premiered at Regal L.A. Live on August 26, 2026 (Deadline). Adria Arjona, Dan Stevens, Michael Biehn and Drew Starkey walked the red carpet. The R-rated, 92-minute film opens in US theatres on September 4, 2026 (Deadline; A24; Fandango).