Niall Horan is a doting godfather to his nephew Theo

Niall Horan is official besotted with his three-month-old nephew Theo.

The One Direction star has spent a small fortune on gifts for the little one, who is the son of his brother Greg and sister-in-law Denise.

“Niall dotes on Theo and sent gifts home for him while on tour. He surprised his brother Greg and Denise with a beautiful crib for Theo soon after he was born and loves spoiling him," a source tells The Sun.

Niall will be at Theo’s christening on 9 November in Mullingar, Ireland – which probably means even more expensive gifts are on the way.

When Theo was born in July, Niall Tweeted; “Congrats Greg and Denise! Wohoooo! I've got a nephew! Cutest kid ever!"

Niall also shared a picture of his nephew on Instagram with the caption: “Remember this little fella! Theo Horan ladies and gents!”