"Harry is in the Holmes chapel harriers hahahah! go on me aul son! #ThisIsWhatHappensAtOurSoundcheck," Horan tweeted to his over 10 million followers.
The 18-second post went viral as it was then re-tweeted over 42,000 thousand times.
If you've ever wondered what Harry Styles looks like running around in super short shorts, here's your chance to find out.
Video of Victoria’s Secret models trying to 'twerk' hits Instagram
Wisconsin business offering 'therapeutic cuddling' forced to close