“Game of Thrones” star Kit Harington made an appearance on The Jonathan Ross Show in which he revealed that he once pulled an excellent April Fool’s Day prank on his fiancé, Rose Leslie.

Harington’s prank, shared in the below video, was to hide a severed head in the couple’s refrigerator. The head, however, was his – an actual screen-used prop from HBO’s “Game of Thrones”. It’s hella real.

Her response? “She pretty much told me that if I did it ever again that would be it, and I think that’s marriage included.”

Check it out: