HBO admitted Monday that a coffee cup spotted in a scene of Sunday night’s “Game of Thrones” was a mistake.

Fans of the fantasy series were buzzing on social media Monday after spotting the out-of-place modern cup on a table next to the character Daenerys Targaryen.

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HBO eventually copped to the blunder — saying it was a latte from the set’s craft services — and tried to make a joke of the situation.

“The latte that appeared in the episode was a mistake,” an spokesperson for the cable network said in a statement. “Daenerys had ordered an herbal tea.”

In an interview on WNYC radio Monday, executive producer Bernie Caulfield also saw the funny side.

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“Westeros was the first place to actually, you know, have Starbucks,” Caulfield quipped, in the interview on Alison Stewart’s “All of It.”

The gaffe is rare for the Emmy Award-winning fantasy series, she said, noting its “prop people and decorators are so, you know, so on it 1,000%.”

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“If that’s the worst thing they’re finding, then we’re in good shape,” Caulfied said.

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