Attention, Pottherheads! Some witch or wizard has hit Rupert Grint with a Cheering Charm — the guy just can’t stop giggling!

One of the new features on the recently-released 31-disc (yes, 31-disc) Harry Potter Wizard’s Collection is a montage of Rupert (Ron Weasley) cracking up (and up and up) to the amusement and exasperation of his co-stars.

“Rupert is the worst for laughing,” says Matthew Lewis (Neville Longbottom). “He does it all the time. And you’ll ask him, ‘What are you laughing at?’ And he goes, ‘I don’t know.’”

For his part, Rupert has no apologies for the good time he had on set, saying, “It was just so much fun. Every day was just playtime, really.”

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Credit: YouTube Photo: Harry Potter's Rupert Grint Can't Stop Giggling