The third series of Sex Education recently dropped on Netflix and many Game of Thrones fans are just realising that the two shows share a link.
That link is a certain Lino Facioli.
The British-Brazilian actor previously portrayed t**-suckling tearaway Robin Arryn in GoT.
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Now much older, Facioli is on our screens again, this time as Moordale High student Dex Thompson - a brainy teen who competes in the school quiz team alongside Maeve Wiley and will surely reappear in season four.
He's also whipped his kit off in the latest season, and a lot of viewers are finding it difficult to process that it's the same person who played little Robin:
Another casting reality that Sex Ed fans are struggling to get to grips with is the fact that the actors who play Mr Groff and son Adam aren't actually related.
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Alistair Petrie plays dethroned Moordale High head Mr Groff, while Connor Swindells plays his on-screen son Adam.
Clearly, they aren't related, but their likeness is such - in terms of appearance and mannerisms - that some people think it could be the best father-son casting ever:
Petrie confirmed to LADbible that Swindells definitely isn't his real son, though he admitted he is like an 'extra son' to him.
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Told that 'Is Mr Groff Adam's real dad' is one of the show's most popular search terms, Petrie said: "Ha, really? That was funny. I can confirm that he's not my real son, although I do love him dearly.
"He's like an extra son to me. I have two boys but I really do consider Connor my third son.
"He's such an incredible talent. They cast him before they cast me, and I remember when we got together and read for the first time, everyone in the room was like, 'ah, ok, I think we've got something here'."
Featured Image Credit: NetflixTopics: TV and Film, Sex Education, Game of Thrones