Question: Keira Knightley began acting as a child and had several supporting roles such as in "Everest", but became famous after landing which role?
Sentence (from "Everest (2015 film)"): It stars an ensemble cast of Jason Clarke, Josh Brolin, John Hawkes, Robin Wright, Michael Kelly, Sam Worthington, Keira Knightley, Emily Watson, and Jake Gyllenhaal.
Relevant evidence: Yes