Answer
In 2000, Knightley's first film appearance of the new millennium was in the historical disaster film Britannic. The film, which was directed by Roger Donaldson, starred Knightley as a young nurse who is assigned to the RMS Britannic, a sister ship to the Titanic. The film tells the story of the Britannic's sinking during World War I, and Knightley's character is one of the survivors.