Watch it for yourself below before jumping to the next paragraph, which would otherwise spoil the ending for you.
It turns out the boy was not worried about Santa coming - but about being able to see his granddad for Christmas.
The ad went viral all over the world in a matter of hours, with thousands of people relating to that same feeling of not being able to be with family this Christmas.
"Here in Poland I showed it to my partner while both working from home today, she cried. Later she went upstairs to show her Mother, they both cried. She then went to the top floor to show her sister, they both cried. That's 3 times she's cried watching the same ad, well done," one person commented.
"Ah Jesus lads, that got me. Christmas was always my grandparent arriving before I went in to see if Santa had arrived. Well played, lovely ad. I hope this tweet makes sense because the phone screen looks all blurry," another Twitter user said, adding a number of crying emojis.
"I'm in a flood of tears," another person said.
"Oh dear, the kicker at the end makes you realise how much Covid has actually affected you, even if you thought it hadn't," someone else added.
Young actor hasn't seen grandparents 'in a long time'
In yet another detail that shows just how deeply personal the ad is for everyone, it has been revealed that the actor who plays the young boy, Cian Kearney, has not been able to see his grandparents in quite a while either.
"I haven't seen my nana and grandad in a long time," he told 96FM's Opinion Line in Ireland.
"Seeing them at Christmas is probably going to be the most important thing, I really want to see them," he added.
