<Tr> <Th> Years active </Th> <Td> 2000--present </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.sofiav.com </Td> </Tr> <P> Sofia Vladimirovna Vassilieva (Russian: София Владимировна Васильева; born October 22, 1992) is an American actress . Her most notable roles include the children's book Eloise in Eloise at the Plaza and Eloise at Christmastime, Ariel DuBois in the Emmy - winning TV series Medium, and teenage cancer patient Kate Fitzgerald in the 2009 film adaptation of My Sister's Keeper by Jodi Picoult . </P> <P> Vassilieva was born in Minneapolis, Minnesota, in Hennepin County Medical Center, the daughter and only child of Russian immigrants Dr. Larissa Vassilieva, a biologist, and Dr. Vladimir Vassiliev, a physicist, both from Novosibirsk . She attended and graduated from Barbizon Modeling and Acting School in Arizona . </P>

The girl who played kate in my sister's keeper