The 27-year-old actor played Neville Longbottom in all eight of the films based on J.K. Rowling's stories about a boy wizard learning his craft.

In a new Instagram post Matthew admitted the magic of the fiction started to become lost on him as he progressed in the franchise. However, after watching the two-part play sequel written by Rowling and two co-authors in London, England, last week (ends06Nov16), Matthew admitted his love for the novels has been given a new lease of life.

"A giant congratulations and an even bigger thank you to these guys and the rest of the cast of #CursedChild," he wrote alongside a picture of himself with several of the cast members of the production. "To be in the movies was a dream come true but it became work and I forgot what it was to be a fan a long time ago. However, over the last two nights I was able to enjoy the world of Harry Potter once again.

"To lose myself in a story so rich and so powerful and, more importantly, that I had nothing to do with was truly magical. I felt like I was nine years old again, discovering it all for the first time and it is very, very special."

Matthew isn't the only member of the films' cast to praise Cursed Child. Emma Watson, who played Hermione Granger on screen, went to see the production earlier this year and also shared her thoughts on Instagram, alongside a snap of her with Noma Dumezweni, who plays the older Hermione in the play.

"Yesterday I went to see the Cursed Child. I came in with no idea what to expect and it was AMAZING," she wrote. "Some things about the play were, I think, possibly even more beautiful than the films. Having seen it I felt more connected to Hermione and the stories than I have since Deathly Hallows (last Potter films) came out, which was such a gift. Meeting Noma and seeing her on stage was like meeting my older self and have her tell me everything was going to be alright, which as you can imagine was immensely comforting (and emotional)!"