Wanna know how the 'Game of Thrones' cast celebrated the Battle of the Bastards?

The Starks and the Boltons may have been sworn enemies on Game of Thrones, but they didn't let that get in the way of a good time.

Speaking at the Con of Thrones convention in Nashville on Friday, Iwan Rheon (aka Ramsay Bolton) revealed that after filming wrapped on episode 609, "Battle of the Bastards," the two sides put aside their differences for an evening of revelry.

"When we finished filming 'Battle of the Bastards,' all the Bolton guys and the Stark guys got together and had a massive party," he recalled. "So we were in there having a great night with all the guys from my army -- the Bolton boys had written a song about Ramsay, so that was really good fun. When you’re filming it, you don’t get to interact much with those guys, and they put so much hard work into it, so it was a great way to celebrate the whole thing with them."

Although the episode featured Ramsay's death, Rheon revealed that it also contained his favorite kill, when Ramsay shot Rickon Stark with an arrow in full view of Jon Snow and his army.

"Everyone’s saying do a zig-zag, do a zig-zag! That’s not gonna work," Rheon deadpanned smugly, channeling his sadistic character. "I think that was my favorite. That was really harsh, but it was clever; he did it for a reason, to draw Jon Snow out -- and it worked."

Ramsay's death remains one of the most memorable in the show's history, and although Rheon admitted that he, like everyone else, would've liked a dragon-related death, overall, he was "really pleased" with being eaten by his dogs.

"I think it was the right time for Ramsay to go. There was nowhere left for him to go; he’d done so many terrible things, what’s he going to do next?" he pointed out. "I felt that he had a good life, cause he almost got there. I remember when I found out, you get the call from David and Dan, and then were like 'hey, congratulations, Ramsay ends up on the Iron Throne!' and I’m like, 'I’m dead, aren’t I?'"

His character arguably usurped Joffrey as the show's most hateable villain, and Rheon has a theory why: "I think the scary thing about Ramsay is he could be standing right next to you and you wouldn’t know he was this crazy psychopathic ruthless killer, and then he’d just turn and you’d have a knife in you," he offered. "There’s nothing he wouldn’t do and that’s quite a frightening thing, and he’ll do it himself. Joffrey would send someone off to kill for him, but Ramsay wants to do the killing."

It's no surprise that Rheon drew inspiration from Heath Ledger's iconic performance as The Joker in The Dark Knight when he was preparing for the role of Ramsay, at least in terms of "how difficult he is to read, and how maniacal he could be and how he could just turn around and kill someone."

But there were two other unlikely characters he was inspired by: "I took the walk from Liam Gallagher [of the band Oasis], and his mischievous side from Dennis the Menace," he laughed. "Those were the three influences for Ramsay Bolton."

He's not talking about the adorable little scamp that Americans know, either -- the British Dennis the Menace is totally the worst.

Gives new meaning to winter is coming, don't it?