Starbucks has a suggestion for Daenerys Targaryen: Try our "dragon drink."

Eagle-eyed fans on Sunday night spotted what appeared to be a Starbucks cup on a table in a scene on the hit HBO fantasy show "Game of Thrones." The coffee chain likely does not exist on the wildly popular show, which last week drew 17.8 million viewers.

A tweet highlighting the gaffe went viral overnight and is trending online on Monday.

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Starbucks' menu currently features dragonfruit tea drinks. The character Daenerys, who appears in the scene with the misplaced Starbucks cup, is known as the "Mother of Dragons."

"TBH we're surprised she didn't order a Dragon Drink," Starbucks tweeted from its official account.

HBO later noted in a tongue-in-cheek statement, “The latte that appeared in the episode was a mistake. Daenerys had ordered an herbal tea.”

-Updated 4:32 p.m.