"Would it be more about them watching me watch the show, or would it take away from the show? I would never want to do anything that would distract or take away from the show.
"I don't know. I'm busy doing a play here at the moment, but I'm not sure."
Author J.K. Rowling recently pleaded with fans not to spoil the plot of the play for other audience members.
She said in a YouTube video: "You've been amazing for years at keeping Harry Potter secrets so you don't spoil the books for readers who came after you.
"So I'm asking you one more time to keep secrets and let audiences enjoy Cursed Child with all the surprises that we've built into the story.
"Potter fans have always had each other's backs."
The play - which will begin preview performances at London's Palace Theatre on July 7 - is set 19 years after the last book ended and sees Harry as an "overworked" employee of the Ministry of Magic and centres on his son Albus.
- Bang! Showbiz