Lady Rose is the illegitimate niece[5] of Cora Crawley, Countess of Grantham.


  1. Her mother was murdered in the 1880s, so she must have been born before then.
  2. In the article announcing that Lily James has joined Downton she states that she "likes being a brunette again" so Rose MUST be brown haired; the article can be seen here
  3. The actress has brown eyes.
  4. Lady Rose is the daughter of Cora's sister and thus niece to Cora.
  5. Lady Rose did not inherit any of Isidore Levinson's fortune, so must be illegitimate, otherwise the fortune would have been split between Cora, his last remaining daughter, and Rose, his granddaughter; it wasn't split, so Rose is illegitimate.
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