Question: Which star featured in Non-Stop is most widely known for her performance as Lady Mary Crawley in "Dowton Abbey"?
Sentence (from "Mary Victoria Douglas-Hamilton"): She was a first cousin of Queen Carola of Saxony, Queen Stephanie of Portugal, King Carol I of Romania, and Princess Marie, Countess of Flanders (mother of King Albert I of the Belgians).
Relevant evidence: No