The cocktail Monday evening drew an eclectic bunch, from Jeremy Strong and Jordan Roth to Yasiin Bey and Karlie Kloss.

Writer-director Michael Shanks’ romantic nightmare, which also stars Damon Herriman, follows a dysfunctional couple whose union is put to the test when strange forces overcome them.

British-born Gore, a two-time Emmy and Olivier award winner, will serve as executive chairman of John Gore studios and Strong, previously CEO of Agatha Christie Ltd, will run the company out of London ...