Despite the rather macabre title of the film, the stylish pair were more for livening things up at the film’s Tribeca Film Festival premiere, and saw fit to show off some rather stylish frocks while they were at it.
The cheeky twosome were inseparable in their ebony and ivory ensembles, with Jessica rocking a boho look in her floor-skimming gown and Kate going for a vintage vibe with luxe curls and a sculpted high-neck dress.
The chilling thriller sees the two in wildly different roles, with Jessica going gritty as a street walker and Kate keeping it squeaky clean as the serial killer's - played by Casey Affleck - unwitting school teacher girlfriend. But the pair clearly hit it off behind the scenes and continued the laughs at the premiere, with Jessica helping Kate through her Marilyn moment, yielding in her fly-away hem.
By Hayley Spencer