Niall Horan played an important part in the arrival of his brother Greg's son

Niall Horan‘s family are getting very excited about his nephew Theo‘s first birthday tomorrow.

The One Direction singer’s older brother Greg – who’s Theo‘s dad – was reminiscing on Twitter this morning about how Niall, 20, helped him out before the birth.

‘Theo’s birthday tomorrow but this time last year Tuesday morning Niall was driving me too hospital for the emotional. Wait for my baby boy,’ Tweeted Greg, 27.

Greg‘s wife Denise shared a cute photo of herself with little Theo, which she captioned: ‘I can’t believe my baby is nearly one !!!’

Ensuring Greg didn’t miss Theo‘s arrival isn’t the only thing Mullingar-born Niall has been noted for on Twitter over the past few hours.

Yesterday, 1D‘s hairdresser Lou Teasdale appeared to write the rather complimentary message: ‘@NiallOfficial ❤️👱❤️you’re the fittest one in one direction 💶🇩🇪⚽️.’

But some Directioners weren’t sure whether Lou – who’s believed to have split from partner Tom Atkin earlier this year – really wrote the comment.

‘I’m gunna have to say this was Niall,‘ Tweeted one, while another said: ‘i see this is for losing a bet.’

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Anna Duff