Conversation so far:
when will harry potter the cursed child come out
Harry Potter and the Cursed Child premiered on 30 July 2016.
how did the play harry potter and the cursed child do
Harry Potter and the Cursed Child set the record for highest all-time weekly ticket sales of any play, grossing over $2.5 million for the week ending 30 December 2018.
who played Ron in Harry potter and the cursed child
In Harry Potter and the Cursed Child Ron Weasley was played by Paul Thornley, Gyton Grantley, and David Abeles.
who played harry potter in harry potter and the cursed child
In Harry Potter and the Cursed Child, Harry Potter is played by Jamie Parker, Gareth Reeves, and John Skelley.

Question: why did three people play Harry potter in the play
Self-contained rewrite: why did three people play harry potter in the play harry potter and the cursed child