Which actress played the heroine Natasha Rostova in the 2016 TV series of Leo Tolstoy's "War and Peace"?

baymax, 2 hours of advertisements probably 😅

hang on a second, if it's a six part adaptation, that's 6 hours on BBC TV, right? how come the Americans got an 8 hours adaptation then? it's all a bit confusing this questions answer!!

I do like lily James, she's a good actress. loved her in Downton Abbey...