The Bronx-born, Ireland-raised beauty received countless nominations for her outstanding performance in "Brooklyn," making her a fixture at Hollywood's hottest ceremonies and parties. So we weren't surprised to learn that Ronan had tapped fashion consultant and Vanity Fair contributing editor Elizabeth Slatzman to help up her style ante. The results? A a total transformation, as we witnessed the young actress ooze confidence, whether she was sporting sophisticated jumpsuits or heavily-embellished gowns.
In celebration of Ronan's 22nd birthday on April 11, we've compiled photo evidence below that shows how she earned a spot on our best-dressed lists.