'Harry Potter' Star Matthew Lewis Remembers the 'Surreal' Day Alan Rickman Died

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Matthew Lewis will never forget where he was when he learned of Alan Rickman's death in January.

The 26-year-old actor, best known for playing Neville Longbottom in the Harry Potter franchise, opened up with FAULT Magazine recently about the fateful day he heard that his former co-star had died of pancreatic cancer at the age of 69.

In a strange twist of fate, Lewis happened to be touring the sets of the forthcoming Harry Potter prequel, Fantastic Beasts and Where to Find Them, when he found out.

WATCH: Daniel Radcliffe, Emma Watson and J.K. Rowling Mourn the Loss of Alan Rickman

"[A producer] was taking me around the studio when the news came through. We were both just completely stunned," Lewis recalled. "But also, to be in the studio when that came through, suddenly every room that I went into, every corridor that I walked down on, I suddenly remembered a story or an image of Alan."

However, being surrounded by memories of the late actor actually helped Lewis deal with the news.

"It got a bit odd. It was quite surreal. But also, powerfully moving as well. It was quite nice to be there. All those happy memories came flooding back and I got quite nostalgic actually," he shared.

WATCH: Alan Rickman: From 'Die Hard' to 'Harry Potter,' A Look Back at His Most Memorable Roles

Lewis shared a tribute to Rickman when he died five months ago, posting a photo of the two of them to Instagram, which he captioned, "I was at Leavesden Studios today when I heard the news. As I walked through the canteen I thought of Alan queuing up for his lunch with us mere mortals."

"I recalled the trailer in which he offered me some of the greatest advice I ever received about this mad profession we shared," Lewis continued in the caption. "Being back in those corridors made me remember a lot of things and I will treasure those memories all my life. He inspired my career more than he ever knew and I'll miss him."

WATCH: Helen Mirren Shares What She Misses About Alan Rickman

Rickman's passing hit Hollywood hard and elicited an outpouring of condolences and memories from his friends and colleagues in the days after his death. Speaking with ET in February, Rickman's Eye in the Sky co-star Helen Mirren shared her fond memories of the veteran thespian.

"He was the best person to go out to dinner with," Mirren recalled. "He was very generous. He always insisted on paying the bill, he was just entertaining and fun and funny and loved going out to dinner and chatting. He loved that."

For more on the life and legacy of the celebrated Harry Potter star, check out the video below.