Sophie Turner made her debut as the character from the A Song of Ice and Fire series created byt whom?
Sophie Turner:  Turner made her professional acting debut as Sansa Stark on the HBO fantasy television series "Game of Thrones" (2011–present), which brought her international recognition. Sansa Stark: Sansa Stark is a fictional character created by American author George R. R. Martin. Sansa Stark:  She is a prominent character in Martin's award-winning "A Song of Ice and Fire" series.
George R. R. Martin