Maisie Williams accidentally revealed a major spoiler regarding the final season of Game of Thrones on Jimmy Fallon Tonight. The host, Fallon, prodded Williams regarding her character and requested her to reveal a small detail from the final season.

The actress let slip that her character Arya Stark was going to die and immediately panicked. She clasped her hands across her mouth and then asked Fallon if the show was live. The host assured her that they would cut the spoiler out but a visibly panicked Williams rushed off the set leaving behind a stunned audience.

However, the host and the actress came back on the show and revealed that it was a huge April Fool’s prank.

Watch the video below: