In Liv Ullmann's film adaptation "Miss Julie" (2014), alongside Colin Farrell and Jessica Chastain, Morton portrayed Kathleen, the fiancée of a valet (Farrell) who finds himself seduced by the daughter of an Anglo-Irish aristocracy (Chastain). The film screened at the Toronto International Film Festival and had a limited release in the UK, France and Spain. "Miss Julie" rated average with reviewers, but the cast received acclaim. Writing for "The Hollywood Reporter", David Rooney thought Morton's Kathleen was "the most satisfyingly drawn character" of the film, which he considered a "ponderous, stately affair".