Louis Tomlinson is officially the first member of One Direction to become a father.

Briana Jungwirth - who was romantically linked with Louis in 2015 - gave birth in Los Angeles this week, a souce close to Jungwirth confirmed.

The 24-year-old singer confirmed last year that he was expecting a baby with long-time friend Briana Jungwirth, 23. The American stylist's due date had been thought to be this month, and a Twitter picture of her baby bump shared recently showed her ready to pop.

Rumours began to circulate this week that the pair had welcomed a child, and this has now been confirmed.

The reports that baby Tomlinson has made his arrival began when a 1D fan Twitter account @1DExclusiveInfo posted the news, writing: "Briana's grandmother confirmed that the baby is a boy."

A further post from an account in the name of Briana's grandmother Marianna Case read: "Louis just let Ur heart dance. U now have another you. A gift that will want to be just like YOU (sic).

"Love him & my young grandchild that gave him to you. LET her know she's special. She just wanted to love U not even knowing who U were or your profile Ur & reputation. Be free & just LIVE. It's simple. Not complex."

Louis is reported to now be dating actress Danielle Campbell, but a source recently revealed he is determined to be the best father he can be - by supporting Briana and his baby in any way he can.

"Although they're not romantically involved, Louis thinks Briana is a great woman and will be a fabulous mother," an insider told MailOnline.

"Louis has been helping Briana financially and is prepared to get stuck in with all the tasks that caring for a baby demands."