Ronan next voiced Marguerite Gachet in the biographical animated drama "Loving Vincent" (2017), and starred alongside Billy Howle as troubled newlyweds on their honeymoon in a film adaptation of Ian McEwan's novel "On Chesil Beach". In a mixed review of the latter film, Kate Erbland of IndieWire felt Ronan was underutilised in it and that her performance had been overshadowed by that of Howle. She then starred in Greta Gerwig's coming-of-age film "Lady Bird", in which she played the titular role of Christine "Lady Bird" McPherson, a high school senior who shares a tumultuous relationship with her mother (played by Laurie Metcalf). It ranks among the best-reviewed films of all time on the review-aggregator site Rotten Tomatoes. Deeming Ronan's performance one of the best of the year, A. O. Scott of "The New York Times" wrote, "Ronan navigates each swerve in Lady Bird's story with an uncanny combination of self-confidence and discovery. She is as spontaneous and unpredictable as an actual 17-year-old ... which suggests an altogether stupefying level of craft." She won the Golden Globe Award for Best Actress in a Comedy or Musical; and received Academy Award, BAFTA and SAG nominations for Best Actress.