Irish-Ethiopian actress Ruth Negga became renowned among American audiences first in AMC's "Preacher," then her breakout role in 2016's "Loving," in which she plays one-half of an interracial couple at the heart of a Supreme Court case whose decision would ultimately legalize interracial marriage. In this wide-ranging interview with W editor-at-large Lynn Hirschberg, Negga reveals her biggest pet peeve — tardiness — and how she came to premiere "Loving" two years after her first audition.