Conversation so far:
who played mel gibson's wife in braveheart
Catherine McCormack portrayed Murron MacClannough in Braveheart.
what films is catherine mccormack known for
Catherine McCormack's film appearances include Braveheart, The Land Girls, Dangerous Beauty, Dancing at Lughnasa, Spy Game, and 28 Weeks Later.

Question: what was the actor's breakout role
Self-contained rewrite: what was catherine mccormack's breakout role