Conversation so far:
How did Keira Knightley's career begin?
After getting an agent at the age of six, Knightley began working in commercials and small television roles.
What was her first major tv show?
Her first on-screen appearance was in the 1993 television film, Royal Celebration.

Question: What role did she play in the film?
Self-contained rewrite: What role did Keira Knightley play in the 1993 television film, Royal Celebration?