Rob McElhenney, aka Mac from It's Always Sunny In Philadelphia, made an unexpected appearance in Westeros this past Sunday.

Do you remember him from It's Always Sunny? If not, here's a refresher:

Rob McElhenney || It's Always Sunny in Philadelphia www.youtube.com

Good, got him in your head?

Now, see if you can catch him here, in Westeros:

Theon killed him pretty early in the episode with an arrow in his head.

But literally, blink, and you miss it. Mostly because your left eye has been shot out by an arrow.

Here, take a look for yourself:

Rob McElhenney and Martin Starr Cameo in Game of Thrones Season 8 www.youtube.com

We love this. McElhenney got the most apropos Game Of Thrones experience possible.

On top of all this, it was apparently also his birthday!

McElhenney tweeted it himself:

And fans were getting clever with their responses:

Winter came, but who says it has to be without sunshine?

The other man who got an arrow straight through his forehead was Martin Starr from Silicon Valley.

McElhenney is most famous for his role as Ronald "Mac" McDonald in It's Always Sunny, but has also appeared on The Mindy Project and will be working on the upcoming Mythic Quest both on-screen and off as a lead, creator, and a producer.both on-screen and off as a lead, creator, and a producer.

In the meanwhile, let's all keep our eyes peeled for mid-2000s comedians making appearances on Game Of Thrones.