Die-hard TV fans will recognise the saying: when you play the game of thrones, you win or you die. Luckily, the consequences for losing a game of Heads Up aren't quite as severe. On Thursday, these two worlds collided when Eugene Simon — who played sixth season finale casualty Lancel Lannister — shared a cute on-set video on Instagram. In the clip, he plays the famous smartphone game with Hannah Waddingham (the Shame Nun), Dean-Charles Chapman (Tommen Baratheon), and Jonathan Pryce (the High Sparrow). We've seen plenty of Game of Thrones cast Instagrams, but there's something mind-boggling and hilarious about watching these actors have fun while in costume.