The celebratory feast at Winterfell on "Game of Thrones" season eight.

  • Warning: Spoilers ahead for the "Game of Thrones" season eight, episode four, "The Last of the Starks."
  • Fans spotted a rogue coffee cup sitting in the background of Winterfell's feast scene. Fans are calling it a Starbucks cup, though the logo is not identifiable as such.
  • The cup appears before Daenerys Targaryen for only a couple of seconds while Tormund is toasting to Jon Snow.
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The latest "Game of Thrones" episode featured a surprising detail. Shortly after the episode aired in the US on Sunday night, tweets started going viral showing a coffee cup seemingly left on a table by mistake during a feast scene.

About 17 minutes into season eight, episode four, "The Last of the Starks," a to-go coffee cup appears on the table in front of Daenerys Targaryen.

The now-infamous coffee cup seen on a "Game of Thrones" episode.

Fans on Twitter and Reddit noticed the cup and began sharing photos and videos of this unexpected modern addition to the intricate sets of Winterfell.

Though many people online have described the object as a Starbucks cup, the logo on the cup's side is unclear.

HBO's behind-the-scenes video, "The Game Revealed," includes a small appearance by a similar-looking coffee cup, suggesting that particular brand is common on the "Game of Thrones" set.

A similar-looking cup on a segment of "The Game Revealed."

Last season, an image from the show featuring a pickup truck in the background circulated online. But that was simply a screenshot taken from a behind-the-scenes video. There was never a truck on the actual aired version of the episode. This time, the anachronistic coffee cup really did appear on the version of the latest episode.

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