There's always been something off with Brandon Stark's empty stare that we see so often in Game of Thrones. This week, actor Isaac Hempstead Wright explained exactly how he pulls it off.

The 20-year-old went on Jimmy Kimmel Live! and shared a few of his experiences from working on the show, including accidentally dropping a spoiler in his math class and the interesting sex ed talk he was forced to have with his mom given his tender age when he began filming the show.

He also talked about his "intense stare"—and his preparation for the role may not be as deep as you think.

"I'm kind of getting good at this sort of intense stare," the star began. "But it's actually aided by the fact that I'm completely blind when I'm on set. I don't have my glasses, and I don't have contact lenses."

"How thick are the glasses?" Kimmel asks him, to which Hempstead Wright replies, "They're not that thick, but I need them to see."

He recalled another time when his vision problems aided his character. In season 7, while filming a scene with Sophie Turner (a.k.a. Sansa Stark), he recalled Turner making a comment along the lines of "Isaac, your stare is like—you're staring into my soul!" to which the actor replied "I can't see you!"

Actors—they're just like us.