So you may not know this, but Alfie Allen — you know, Theon (I mean Reek! Reek is his name!) — is the brother of pop star Lily Allen. And who wouldn't want to use their sibling's power in Westeros to get a role on the acclaimed show? Well, this pop star was actually offered an opportunity, but Lily Allen turned down a role on Game of Thrones because it would ostensibly be incest. But like... real incest.
In Allen's Reddit AMA, she said the following:
But I've been asked to do a Game of Thrones cameo, they asked me if I'd be interested in playing Theon's sister, and I felt uncomfortable because I would have had to go on a horse and he would have touched me up and shit. Once they told me what was entailed, I said no thanks.
So that would have been double incest! Remember when Theon (pre-Reek era) felt up Yara? Yeah, that. But they're real brother and sister so... uh... what were the producers thinking? Is that tongue in cheek? No. Not really. No need for real life Cerseis and Jaimes over in the Allen family.
But would Allen consider joining her brother, in all of his character's penis-less shame, on the show? Sure! She said:
I would be open to doing a musical cameo like Sigur Ros, though.
That could potentially be cool. A Sheezus rendition of "The Rains of Castermere?" I'm down!