The second came with Greta Gerwig’s semi-autobiographical coming-of-age romp, an instant classic that saw Ronan embody the titular rebellious high schooler as she argues with her overbearing mother (Laurie Metcalf), falls for the wrong boys (Lucas Hedges, Timothée Chalamet), loses her best friend (Beanie Feldstein), and, in one unforgettable early sequence, throws herself out of a moving car. In short, she’s a force of nature who became a figurehead for frustrated teen girls everywhere. Ronan’s performance rightfully secured the actor her first Golden Globe, as well as BAFTA, SAG, Critics’ Choice, and Independent Spirit Award nods.
Mary Queen of Scots (2018)
With a copper plait, chainmail-covered corsets, and giant hoop skirts, the actor transforms into the fierce Mary Stuart opposite Margot Robbie’s steely Queen Elizabeth I (and Ronan’s now-husband, Jack Lowden, as the dashing Lord Darnley, the former’s second spouse) in Josie Rourke’s sumptuous recreation of 16th-century Britain. Despite a starry supporting cast—Gemma Chan, Joe Alwyn, Guy Pearce, David Tennant—it’s impossible to take your eyes off Ronan, whether she’s riding into battle on horseback, wielding shotguns, navigating palace intrigue, or finally facing up to her powerful rival.