After a near two-year hiatus, Game of Thrones returned to our screen in the early hours of Monday morning with the first episode of its eighth - and final - season.
With the new season comprising of a mere six episodes, the season eight premiere had a lot to get through. So much so that fans may have missed a familiar face popping up ever so briefly.
Just in case it's not obvious, this post contains spoilers for the most recent episode of Game of Thrones,consider this your warning.
McElhenney could be seen briefly during the scene in which Theon rescues Yara from their uncle Euron's ship.
Theon and his men took down the ironborn guarding Yara, including McElhenney's unnamed fleetsman, who got an arrow through the eye for his troubles.
The actor confirmed the cameo on his Instagram pageafter the episode aired, sharing a photo of his brief appearance along with the caption "Don't blink". He also set his location set as Seven Kingdoms of Westeros.
— Loredana Valerio (@lorevalx) April 15, 2019
While McElhenney's cameo may seem odd to some, it's just the latest crossover in the ongoing relationship between our two favourite shows on TV thatgoes back a while now.
Game of Thronescreators David Benioff and D.B. Weiss penned an episode of It's Always Sunny (Season 9's "Flowers for Charlie")where Charlie Kelly (Charlie Day) undergoes an experiment to make himself smarter.
The pair then cameoed as themselvesin Season 12's episode "The Gang Goes to a Water Park", and have now repaid the favour following'sMcElhenney's appearance in the season 8 premiere.
We'll make sure to keep an eye out to see whether Sweet Dee, Charlie or The Golden God Dennis Reynolds pop up in Westeros at some point over the course season eight.