Williams, who plays Arya Stark in HBO’s hit fantasy drama, casually dropped what she claimed was a devastating detail about her character’s fate in the show’s eighth and final season during her interview with host Jimmy Fallon.
Her fake reaction to realizing she’d dropped the bombshell was award-worthy:
Of course, it was an April Fools’ prank ― which Williams and Fallon took great delight in revealing after she’d stormed off the set.
Or was it?
The final season of “Game of Thrones” begins April 14.
Check out the full clip above.