Last week(24 August), the 30-year-old singer announced the happy news on Instagram, posting a photo of his son as well as sharing the name they had chosen.

The ‘Peaches’ singer shared a close-up of his son’s foot, revealing the unique name they had chosen in the accompanying caption. “WELCOME HOME, JACK BLUES BIEBER,” the post read.

British model and podcaster, Adwoa Aboah is a friend of the couple and has also welcomed her first child with American skateboard star, Daniel Wheatley.

The founder of the ‘Gurls Talk’ podcast took to Instagram yesterday (28 August) to share a series of cute pictures after welcoming her daughter to the world.

She wrote: “Our stunner of a daughter was born at 11:22pm on the 23rd of August by emergency caesarean. Our hearts have literally exploded into a million pieces.

“Shy Trinity Afua Wheatley :,) what the f**k.”

Fellow celebrities rushed to congratulate the new mother including Charli XCX and Rita Ora.

Hailey Bieber also left a comment as the two new mums celebrated their growing families.

Along with a series of heart eyes emojis she wrote: “Baby Shy!!!!” to which Aboah responded: “A day apart.”

So far, the Bieber’s have not commented on the date they actually welcomed baby Jack into the world, but fans were quick to spot the comment and begin speculating.

“So, baby Jack was born on August 22^nd?” one asked.Neither parent responded to the fans questions.

A source close to the couple said they are adapting well to becoming parents. They told People: “They're both overjoyed. The baby is such a miracle. He's adorable and doing well. Hailey's doing well, too.”

The pair married in 2018 and announced their pregnancy back in May of this year.

The source continued: “The pregnancy was something that they very much wished and prayed for.

“The day they found out that Hailey was pregnant was the best ever for Justin. He was over the moon with excitement. It was a big celebration for them.”