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We have seen the first white walker, created by the the children of the forest.

the first white walker, created by the the children of the forest

We also see a white walker who was supposed to be the Night King several times.

Night King

Based on their faces, can they be the same person? I know the best canon explanation for the Night King is him being the 13th Lord Commander of the Night's Watch, however, this can easily be a red herring.

Any canon evidence, supporting/disproving the first white walker being the Night King is also welcome. Although the images are from the series, book explanations are also welcome.

EDIT: Actually my question is very different and focused compared to the differences between books and show. It is already somewhat answered, both characters played by the same person.

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    It's the same actor, which is why the faces look so similar. However, based on the actor's IMDB page that's his only acting credit (on Game of Thrones), and he's primarily a stunt performer on the show. I don't think the fact they recycled an actor is enough to prove that the first White Walker and the Night King are the same. – Anthony Grist Aug 5 '17 at 12:09
  • We don't know for sure, as Aegon's answer suggests. – Gallifreyan Aug 5 '17 at 12:15
  • Actually there are two Night Kings. But although I agree that extras are recycled a lot, I don't think Night King is an extra, while first white walker might be. – C.Koca Aug 5 '17 at 12:16