The 48-year-old, who co-owns the Welsh club with Ryan Reynolds, appeared on the AwayDays YouTube channel.
He looked through various classic football shirts and chose a 2004/05 green and white Celtic shirt, which he tried on at the end of the video.
Rob McElhenney in a Celtic jersey. (Image: YouTube/@awaydaysfootball)
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McElhenney’s Wrexham recently gained promotion to the English Championship after finishing second in League One.
He and Reynolds took control of the club in 2021, and have since achieved three consecutive promotions.
Their ultimate aim is to reach the Premier League.
In other news, Celtic loanee Marco Tilio has expressed his desire to play in the 2026 World Cup.
The winger is currently on loan at Melbourne City.
When asked by Optus Sport where he envisions himself in a year’s time, Tilio said: “I’d hope to say I’ll be playing consistently over in Europe… we’ll see, but that’s where my head is at.”
Regarding his World Cup ambitions, Tilio stated: “Of course, that would be the plan.
“I’ve got to do everything up until then to make sure I’m up for selection.”