The actress, 18, who plays Arya Stark on the hit HBO series, says she was “heartbroken” to see – spoiler alert – her fictional half-brother, Jon Snow (played by Kit Harington), get murdered on screen during the final minutes of Sunday’s season 5 finale.
“People are really hurt by it, but that’s what this show does,” says Williams. “If you haven’t learned that by now, well, I can’t help you,” she told PEOPLE Now.
The actress then goes on to dish with host Jeremy Parsons about important topics, like Justin Bieber‘s bare bottom.
“Are you a “Belieber?” Parsons asks, showing her a photo of the 21-year-old singer’s censored back-end.
“No, this is not my thing,” responds Williams, as she struggled to understand why Bieber would share the photo with all his followers on Instagram. “Lots of his fans are really, really, young. He should be considerate of that and not have his bare bottom on display,” she reprimands, waving her finger.
Williams then goes on to play a game of “Arya”-able To Do This? – where she’s given one-minute to try to rap, use a southern accent, and act like a dragon, among other silly things.
Watch Williams’s full interview in the clip above!