"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.
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