When a modern coffee cup was spotted in a final season episode of GoT, fans went into meltdown - but whose fault was it?

As if there isn’t already enough tension in the final season of Game of Thrones, now two of the show’s stars are finger-pointing over an embarrassing prop mistake that made it to air.

Emilia Clarke as Daenerys Targaryen in Game of Thrones. Picture: HBO

She’s the Mother of Flagons.

The New York Post reports that Game of Thrones actress Emilia Clarke — who portrays Mother of Dragons Daenerys Targaryen on the hit HBO series — is responsible for the modern-day coffee cup that sneaked its way into a scene in last week’s episode, according to co-star Sophie Turner.

Emilia Clarke as Daenerys Targaryen in Game of Thrones. She’s been blamed for the modern coffee cup appearing in an episode of the final season. Picture: HBO

Turner, who was implicated in the scandal because she was previously photographed on set with a similar cup, threw her fellow actor under the proverbial horse cart during an appearance on The Tonight Show Starring Jimmy Fallon on Friday night.

“Let’s clear this up. That’s in a different episode,” Turner said of the on-set snap, which shows her holding a coffee cup while posing with actress Bella Ramsey.

Sophie Turner as Sansa Stark. She told Jimmy Fallon her co-star Emilia Clarke was responsible for the modern coffee cup making it into a scene. Picture: HBO

“And also, we all have the same cups for all of our water and tea and everything, so I’m gonna just go with, I mean look who it’s placed in front of. Emilia Clarke. She’s the culprit.”

The steaming controversy fomented last Sunday when a paper coffee cup made a guest cameo on the fourth episode of the medieval fantasy show’s final season, entitled The Last of the Starks.

Emilia Clarke, whose character Daenerys Targaryen is facing trouble on many fronts in her pursuit of the Iron Throne, could probably do with a coffee right about now. Picture: HBO

The wild anachronism sent fans into a tizzy online shortly after they spotted it during the episode’s 17th minute. HBO later digitally removed the cup, originally thought to be a grande Starbucks but later revealed as a simple craft-services beverage, from a version of the episode view-able on the HBO Go app.

The takeaway coffee cup in a scene from Game of Thrones.

This report originally appeared in The New York Post and is reprinted by permission.