The One Direction boys

Could the One Direction boys be getting sick of one another? Speculation is rife that Harry Styles snubbed Mullingar native Niall Horan during his birthday party celebrations.

According to the rift between the 'Live While We're Young' singers began a few weeks ago when Niall popped along to his band mate's 19th birthday.

Despite Styles having an open tab at the bar, Horan was reportedly asked to buy his own drinks.

Read More: 'It's Because He's Irish' pop star predicts Niall Horan will be the first to leave One Direction

“Although he had a tab behind the bar, Harry told staff not to allow Niall to put anything on it,” a source told the MailOnline.

It is also understood Styles booked a cab for his blond band mate to go home at 12, while he continued to party.

“He also organized a car to pick Niall up at midnight while he, Nick and some others carried on partying.”