Hagrid, Harry and Professor Quirrell stand in the Three Broomsticks in 'Harry Potter and the Sorcerer's Stone'

Any film franchise that ran as long as Harry Potter is bound to be a fount of amazing behind-the-scenes anecdotes. While oftentimes we hear the best stories from the cast, it’s not uncommon for some of the higher ups to also weigh in from time to time. Now, one of Harry Potter’s producers has revealed a "special" moment he has of Daniel Radcliffe and Robbie Coltrane from the film series’ earliest days -- and it’s easy to see why he remembers it so vividly.

David Heyman served as a producer on all eight Harry Potter films, which means he had a pivotal role in shaping the series and also bore witness to many of its most unforgettable moments, both on screen and off. In a new interview for Empire Magazine's 20th anniversary edition, he delves into his memories about making the iconic film franchise -- including what it was like on set for the very first day of Harry Potter and the Sorcerer’s Stone:

I realized I had something special when I first read the book. I loved it. It moved me. I fell in love with it before it was published. I’ll never forget being on set that first day, filming the last scene of Philosopher’s Stone where Hagrid and Harry bid farewell at the railway station at Hogsmeade. Dan [Radcliffe] was wearing these contact lenses to make his eyes green, and he had an allergic reaction to them. His eyes were red and swollen and we had to take them out – we thought we may add that green digitally, though ultimately we decided not to because it felt artificial. But Dan’s eyes were puffy and red, and oddly it was quite appropriate for the scene where he was saying goodbye to Hagrid.

Ouch -- kudos to Daniel Radcliffe for being able to remain professional in the midst of what sounds like a pretty uncomfortable situation. All together, it sounds like they were able to take what could have been a logistical nightmare and make it work for the movie. That was, of course, the first of many unforgettable moments for the Harry Potter cast and crew. In the years since the franchise has wrapped production, many of the actors who grew up on set have shared their fondest -- and sometimes not-so fond -- memories of their time together.

As we approach the 20-year anniversary of the premiere of Harry Potter and the Sorcerer’s Stone, it seems like everyone involved is becoming even more nostalgic than usual. That’s understandable, of course -- Tom Felton, who played Draco Malfoy, has made it clear he’d be more than willing to plan reunions for the cast. It will be interesting to see what those involved cook up to honor the milestone, and what other interesting stories they have to share with us in the coming months.

Harry Potter’s Tom Felton Shares Adorable Throwback For Emma Watson’s Birthday news 11h Harry Potter’s Tom Felton Shares Adorable Throwback For Emma Watson’s Birthday Sarah El-Mahmoud
Another Harry Potter Star Is Having A Baby And Her Co-Stars Are Pumped news 3d Another Harry Potter Star Is Having A Baby And Her Co-Stars Are Pumped Jessica Rawden
Harry Potter’s Matthew Lewis Recalls Sweet Moment With Co-Star Alan Rickman On The Late Actor’s Last Day news 5d Harry Potter’s Matthew Lewis Recalls Sweet Moment With Co-Star Alan Rickman On The Late Actor’s Last Day Adreon Patterson