Redeem now - Warning: Spoilers for HBO's "Game of Thrones" season eight, episode one, "Winterfell."
- During the season eight premiere of the HBO show, Theon Greyjoy rescues his sister Yara from their uncle Euron's ship where she was held captive.
- The soldiers guarding Yara are stealthily dispatched by Theon and some allies via a few well-placed arrows.
- One of the unlucky guards who took an arrow to the eye was played by Rob McElhenney, who fans may know as Mac from "It's Always Sunny in Philadelphia."
- The actor posted a close-up of the moment on his Instagram with the caption "Don't blink."
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"Game of Thrones" is no stranger to a celebrity cameo.
The appearance of Ed Sheeran in season seven ruffled many feathers to the point that even the singer himself admitted: "No one wants to see me come back."
Read more: Ed Sheeran says his 'Game of Thrones' character is probably dead: 'No one wants to see me come back'
Sheeran's unpopularity didn't stop the producers adding another cameo in the latest season, which premiered on Sunday. But it was arguably a much safer bet.
During the first episode of the new season, Theon Greyjoy rescues his sister Yara from their uncle Euron's ship where she was being held captive.
The soldiers guarding Yara are stealthily dispatched by Theon and some allies via a few well-placed arrows.
What you may have missed, though, is that one of the unlucky guards who took an arrow to the eye was played by Rob McElhenney, who fans may know as Mac from "It's Always Sunny in Philadelphia."
The actor posted a close-up of the moment on his Instagram with the caption "Don't blink."
His "Always Sunny" costar Glenn Howerton (Dennis) was quick to chime in with a comment: "You got got, homeboy."
In a behind-the-scenes interview, McElhenney says, "They gouged my eye out!" pointing at the fake wound over his eye; "They gouged my f------ eye out!"
McElhenney was joined by fellow comedy actor Martin Starr of "Silicon Valley," who also got a part as an extra onboard the Iron Fleet.
"They can put it back in, right?" McElhenney joked to Starr; "[David] Benioff told me they would."
McElhenney's love of "Thrones" is no secret — in 2013, the actor tweeted to say that the show's co-creators David Benioff and D.B. Weiss guest-wrote an episode of "It's Always Sunny."
—Rob McElhenney (@RMcElhenney) May 14, 2013"Game of Thrones" airs Sundays at 9 p.m. ET on HBO.
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