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Jon Snow may know nothing in the land of the Seven Kingdoms, but Kit Harington sure knows how to pull a terrifying April Fools’ joke.

The Game of Thrones star debuted his prankmaster skills on The Jonathan Ross Show last week when he shared a video of the downright evil trick he pulled on his fiancée, Rose Leslie.

In the clip, an unsuspecting Leslie approaches their fridge to retrieve a Brita pitcher to find that Harington replaced the milk with a decapitated replica of his head. Screaming in horror, Leslie darts to the kitchen counter to put the Brita down (priorities) then collapses on the floor gasping and crying. She may be a classically trained actor, but Leslie’s tears are real.

After scaring the daylights out of his former GoT costar turned lady love, Harington realized he may have gone overboard, telling Ross, “After that, she was in tears, and I was there going, ‘April Fools.’ It didn’t go down well. She pretty much told me if I did it ever again, that would be it. And I think that’s marriage included.”

Move over Cersei, there’s a new lover of cruel and unusual punishment in the Game of Thrones universe.

RELATED: Kit Harington Is Getting Married & He’ll Shut Down ‘GoT’ Production If He Wants To

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