In Season 4 of Supernatural, when Sam and Dean told Chuck that he was writing about events⭕️ in their life that hadn't happened yet, he replied Obviously, I am God  with surprising conviction. Chuck went⭕️ on to detail the kind of God he was.

Chuck is God (and also he has a sister). In the show's⭕️ 14th season, it threw another twist Chuck's way: Not only is he God, but he's been the author of Sam⭕️ and Dean's lives, and when Sam (Jared Padalecki) and Dean (Jensen Ackles) decided not to follow through on Chuck's story,⭕️ well, they pissed him off.