The award-winning supporting player – from ‘Marriage Story’, ‘Nurse Jackie’ and ‘Severance’ – has spent her career slipping in and out of ensemble casts, and largely avoiding the press. But her starring role alongside Robert Pattinson in the ‘To Catch a Predator’-inspired thriller ‘Primetime’ has taken her to new heights. She speaks to Adam White about Chris Hansen, her early struggles, and her fears about finally coming out of her shell