By Heather Waugh For Dailymail.com
Published: 19:41 BST, 16 April 2019 | Updated: 19:41 BST, 16 April 2019
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There were two blink-and-you'll-miss-it cameos in Sunday night's Game of Thrones season eight premiere.
Eagle-eyed fans of It's Always Sunny in Philadelphia may have spotted Rob McElhenney, who plays Mac in the FXX comedy, making a very brief appearance in the HBO show.
McElhenney took to Instagram to post a screenshot of his grisly scene and wrote: 'Don’t blink. #gameofthrones'
WARNING: SPOILERS AHEAD
Blink and you'll miss it: Rob McElhenney was one of two surprise celebrity cameos on Sunday night's premiere episode of season eight of Game of Thrones
The 42-year-old actor popped up during the scene in which Theon rescues Yara from Euron, taking out a few of his men.
One of those men was McElhenney who ended up with an arrow through his eye.
Silicon Valley star Martin Starr also made a quick cameo, playing another of Euro's men to perish in the fight scene.
It's no surprise McElhenney nabbed a role in the series as he and GoT creators David Benioff and D.B. Weiss go way back.
The 42-year-old actor took to Instagram to post a screenshot of his grisly scene where he was killed by Theon and his men trying to rescue Yara
Gruesome death: McElhenney ended up with an arrow through his eye as he perished almost