Written by Sara Bordon, January 25, 2016

One Direction heart-throb Louis Tomlinson has become the first member of the boy band to have a baby of his own.

And, in typical rock star fashion, the singer has reportedly given his newborn son a quirky name in… Sydney Rain!

Louis’s ex-girlfriend Briana Jungwirth gave birth to the healthy baby boy on Friday, with the 24-year-old by her side.

Louis Tomlinson joins Briana Jungwirth at Snoop Dogg's 'Bush' Album Release

‘Louis and Briana are yet to file a birth certificate but they’ve agreed on Sydney Rain,’ a source said of the unusual moniker that sounds like it was inspired by an Aussie weather forecast. ‘It will be rubber-stamped in the next five days.’

The 1D star took to Twitter to announce the birth of his son, writing, ‘I’m pleased to say my baby son was born yesterday 🙂 He is healthy and pretty amazing 🙂 I’m very happy!!’

Briana, 23, and Louis have yet to finalise custody plans, but Louis is said to want to be hands-on with the baby.

‘It’s not yet known whether the baby boy will take Briana’s surname or Tomlinson,’ an insider revealed.

Louis is also said to have been helping to financially support Briana, but they are still in talks about ‘who is going to pay what’, according to a source.

Meanwhile, 1D’s Harry Styles, 21, took to social media to congratulate his band mate.

‘Flowers all round,’ the star wrote.

With One Direction’s manager, Simon Cowell, rumoured to be godfather, we think this tot will be one spoilt little man!

RELATED: Louis speaks out about impending fatherhood!

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