A cikin 1999, an fara zabar 'yan wasa don Harry Potter da Dutse na Falsafa (wanda aka saki a matsayin Harry Potter da Dutse na Falsafa a Amurka), fim din da aka tsara na marubucin Birtaniya JK Rowling mafi kyawun littafi. 'Yan wasan kwaikwayo sun sami Watson ta hanyar malamin wasan kwaikwayo na Oxford, kuma masu samarwa sun gamsu da amincewarta. Bayan da aka yi wa'azi takwas, mai samarwa David Heyman ya gaya wa Watson da kuma masu neman Daniel Radcliffe da Rupert Grint cewa an zaba su ne a matsayin abokan makarantar Hermione Granger, Harry Potter da Weasley, bi da bi. Rowling ta goyi bayan Watson daga gwajin ta na farko.
Harry Potter da Dutse Mai Hikima