Remarkably, Ronan had already been acting for four years when she broke out at the age of 13, playing the precocious and reckless child whose actions have devastating consequences on the couple (Keira Knightley and James McAvoy) at the heart of Joe Wright’s heartbreaking, decades-spanning tale of lost love and crippling regret. It’s a mind-bogglingly delicate and self-assured performance that led to a best-supporting-actress Oscar nod—and fast-tracked Ronan onto the A-list.
