The Olympian took a selfie with the Ballad of the Mighty I singer and accidentally named his estranged brother Liam on Twitter.
However, taking to Twitter to post their Instagram selfie, the long distance runner wrote: “Chilling with my boy liamgallagher U2 concert in Twickenham..!!”
Never one to miss the chance for some craic, Liam fired back a hilarious response at the long distance runner, writing: “Good to see u2 mo as you were LG x”.
Luckily Mo didn’t make the same error on his Instagram post, which included Noel’s handle @themightyi.
The six time European Champion probably wouldn’t have made the error on Twitter, had he known what Liam had to say about U2 and his brother last week.
Responding to a fan who asked him if he’d be watching the One band, the outspoken rocker said he’d “rather eat shit” than watch Bono and co.