He's reportedly been having a 'passionate physical relationship' with a certain Made In Chelsea star in recent weeks.
But it seems that Niall Horan is too much man for just one woman to enjoy as he's apparently been 'secretly' dating gorgeous Victoria's Secret model Barbara Palvin.
While the pair were spotted leaving the Class Of '92 premiere afterparty not long after each other on Sunday night, they were also seen together on a low-key cinema date the night before.
The pair, both 20, went to the Everyman Cinema in north London on Saturday night to watch The Hunger Game: Catching Fire but arrived separately to avoid being papped. Sneaky.
A source told The Mirror: ''Barbara came in first and was playing on her phone until Niall arrived. He had a security guard with him, and they sat in the front row so nobody could turn around to see them.
“He kept a baseball cap on and pulled it low, to try to avoid being seen. They clearly wanted to keep a low profile.
''They were laughing and joking together throughout the film, and both were dressed casually. You could tell they were comfortable in each other’s company.”
But despite trying to go incognito, it seems that Barbara couldn't resist letting the world know who she'd spent the evening with.
She wrote on Twitter: ''@NiallOfficial hunger games buddie.''
And the very next evenign the pair were together again as they left the premiere party... and it seems that the VS model wasn't sleeping alone that night.
The One Direction star is really not doing much to quash his ladies' man reputation as he seems to be wooing pretty much everyone in London - how does he have time to work?!
Niall was reportedly keen on dating X Factor star Tamera Foster, and has also been getting more than cosy with unlucky-in-love Louise.