The 25-year-old actress voiced her support for the casting of a black Hermione on Twitter, which otherwise received strong reactions from fans on internet.
Can't wait to see Noma Dumezweni as Hermione on stage this year. #harrypotterandthecursedchild #2016? Emma Watson (@EmWatson) January 2, 2016
In the past, author J K Rowling also tweeted her support for the casting decision.
The two-part play, which is based on a new original story by Ms Rowling, catches up with Harry, Ron and Hermione as adults before shifting the focus to Harry's youngest son Albus. (Also Read: Harry Potter and the Cursed Child: Play Set 19 Years After Last Book)