Warning: This post contains spoilers for previous seasons of Game of Thrones.

When little Tommen Baratheon took the Iron Throne on Game of Thrones after Joffrey's untimely demise, you'd be forgiven for thinking, Where have I seen this guy before? It turns out, you've seen him on Game of Thrones before—but as another character.

Dean-Charles Chapman, the actor who plays King Tommen, started in the role during season four. Previously, the role was played by Callum Wharry, who was much younger, and Chapman replaced him once the character became more prominent.

But it turns out that Chapman, now 18, had been around Westeros before. HelloGiggles points out that he previously played Martyn Lannister, in Season 3, for two episodes. Martyn was a squire in the Lannister army who was held prisoner by the Tullys, then killed off, along with his brother Willem. This means that Chapman has played his own first cousin, once removed. Here's Martyn interacting with Talisa, starting at 2:30:

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And his brutal death scene:

And how here's Chapman as Tommen:

Leave it to a Lannister to keep it in the family.

From: Esquire US