Sofia Vassilieva is an American actress born on October 22, 1992, in Minneapolis, Minnesota. She gained fame for her role as Eloise in the Eloise film series and for her performance in the movie My Sister's Keeper, where she played the character Anna Fitzgerald. In addition to her film work, Vassilieva has appeared in various television shows, including Medium, where she portrayed the character Ariel Dubois. She has received recognition for her acting skills and has been nominated for several awards throughout her career.