Justin Bieber and wife Hailey have already picked out the 'perfect' name for their baby and are now decorating a nursery - after surprise pregnancy reveal

Justin Bieber and his wife Hailey shocked fans on Thursday by announcing that they're expecting their first child together.

A source told PEOPLE that Justin, 30, is 'so excited' to be a dad and that the couple have already chosen the 'perfect' name for their bundle of joy.

Hailey and Justin, who have not revealed their child's gender, have also begun picking out decorations for a nursery inside their $26M Beverly Hills mansion.

'They will be great parents, and Justin will be super involved. This will be the next important project for him. He's so excited to raise his baby,' the insider gushed.

'They have a name that they think is perfect. They're also starting to decorate a nursery. They can't wait to meet the baby.'

Justin Bieber and his wife Hailey shocked fans on Thursday by announcing that they're expecting their first child together; seen in 2023

A source told PEOPLE that Justin, 30, is 'so excited' to be a dad and that the couple have already chosen the 'perfect' name for their bundle of joy 

Hailey and Justin 'have both been very emotional about' the baby news and 'feel so blessed.'

The source also revealed why the couple waited to reveal Hailey's pregnancy.

'They've also felt very protective of the baby from the moment they found out. They shared with family and close friends early on. It was very important for them to keep it quiet and just enjoy [it] for as long as possible before they publicly confirmed,' they explained.

When the couple found out Hailey was pregnant, it was 'just the best day for them.'

The model announced her pregnancy joy with singer Justin, 30, with a beautiful Instagram video showing her debuting her bump in a custom Saint Laurent lace wedding dress by Anthony Vaccarello, paired with a flowing veil, during a surprise vow renewal in Hawaii.

The star and the Baby hitmaker shared a sweet kiss as they celebrated their news during their outdoor ceremony - with Hailey sporting a new diamond ring.

Justin - who was casually clad in a backwards cap, bomber jacket and jeans - was seen filming his bride cradling her bump - with the video set to a new track by the Grammy winner.

The couple have been married since September 2018.

TMZ reports that Hailey is more than six months pregnant.

Kendall Jenner quickly took to the comment section of Hailey's post to declare: 'ahhhh here come the tears again.'

Hailey and Justin, who have not revealed their child's gender , have also begun picking out decorations for the nursery inside their $26M Beverly Hills mansion 

The source also revealed why the couple waited to reveal Hailey's pregnancy 

Hailey showed off her bump in her bridal gown as Justin embraced her

Hailey looked smitten with her husband as she recited her vows 

Hailey showed off her growing bump in the video

Kim Kardashian wrote: 'I love you guys sooooo much!!!!' while Chrissy Teigen penned: 'EEEEEEEEEEEEEEEEEEEEEEEEE!!!!!! You are going to be an amazing amazing mommy oh boy get ready!!! So exciting so happy for you both!!'

Kylie Jenner wrote: 'i love you guys!!!! ahhhhhhhh' while mom Kris Jenner wrote: 'We are so so excited can't wait can't wait what a blessing!!!!!'

Justin and Hailey were first introduced in 2009 by Hailey's father Stephen Baldwin at the premiere of Justin's documentary Never Say Never.

The pair then had a brief fling in 2016 amid a break in his on/off decade-long romance with Selena Gomez.

When he and the Disney Channel alum, 31, finally called it quits for good in May 2018, Justin fell into Hailey's arms and they've been attached at the hip since.

The pair have spoken candidly about their relationship over the years — including their 'really tough' first year of marriage.

Speaking to GQ in 2021, Justin revealed that his and Hailey's initial difficulties stemmed from 'trauma' and 'just lack of trust.'

'There was all these things that you don't want to admit to the person that you're with, because it's scary. You don't want to scare them off by saying, 'I'm scared,'' he explained.

The pair were seen kissing in a field as they celebrated the news

The parents-to-be looked emotional as they embraced

Justin smiled at his pregnant wife as they renewed their vows in Hawaii

Justin kissed his wife as they celebrated the happy news 

Stars including the Kardashian - Jenners sent their well-wishes at the happy news

The Sorry hitmaker admitted during the first year of marriage he was 'on eggshells' but now he's never felt more stable.

The couple previously expressed their mutual desire for children but in 2023 Hailey expressed concerns about raising a family in the spotlight.

'I want kids so bad but I get scared. It's enough that people say things about my husband or my friends,' she told the Sunday Times last year.

'I can't imagine having to confront people saying things about a child. We can only do the best we can to raise them. As long as they feel loved and safe.'

Last year the Rhode skincare founder dished that she and Justin would like to try for a family 'in the next couple of years.'

You don't know how long that process [of getting pregnant] is every going to take. Definitely no kids this year, that would be a little hectic, I think,' Hailey told WSJ.

'There's this thing that happens for women when you get married. Everybody assumes it's: 'First comes love, then comes marriage, then comes the baby,' the wife of Justin Bieber explained.

'Well, what about the things I want to accomplish in my business? I think I had it ingrained in my head that I was going to want to have kids right away and I was going to have kids super, super young. Then I turned 25 and I'm like, I'm still super, super young!'

While they frequented similar social circles after their first meeting in 2009, it was not until 2015 that it was clear they were more than friends.

Justin was in a on-off and highly-publicized romance with Selena Gomez from 2011 until 2014 before reuniting for a short while in 2017. They split for good in 2018.

The couple have been married since September 2018 - pictured 2021

Future Mr. and Mrs. Bieber: A young Hailey is introduced to Justin by her father, Stephen Baldwin, in 2009 

Justin was in a on-off and highly-publicized romance with Selena Gomez from 2011 until 2014 before reuniting for a short while in 2017. They split for good in 2018 (pictured in 2011)

Justin recently sparked concern as he posted a number of selfies of him in tears

Hailey and Justin rang in 2016 together with a vacation to Anguilla, where Justin posted a photo of them sharing a kiss.

Around this time, the couple acknowledged they were seeing each other, without being in an exclusive relationship.

'We are not an exclusive couple,' Hailey told E! at the time.

Justin also admitted Hailey was someone he 'really' loved, but that he was not quite ready to devote himself to a relationship.

'What if Hailey ends up being the girl I'm gonna marry, right? If I rush into anything, if I damage her, then it's always gonna be damaged,' he told GQ.

This saw Justin briefly move on from Hailey to have a short relationship with Sofia Richie.

Justin and Hailey then started dating one another in 2018 - and the lovebirds were often pictured packing on the PDA for all to see throughout New York City.

Just over a month after reigniting their romance, the couple were engaged.

Justin proposed to Hailey during a romantic getaway to the Bahamas with a massive diamond ring.

'My heart is COMPLETELY and FULLY YOURS,' gushed the pop star in a romantic social media gesture to confirm the news.

The niece of Alec Baldwin received a large, oval-shaped diamond engagement ring from Justin when they were on holiday in the Bahamas to mark the occasion.

Justin married Hailey at a courthouse in New York City in September 2018.

Hailey showed off a new wedding band in their announcement video

Justin married Hailey at a courthouse in New York City on September 13 - they celebrated with a wedding party one year later

On Valentine's Day, a source told Entertainment Tonight how marriage has been extremely important to the couple

The couple exchanged vows on the same day they obtained their marriage license at the courthouse on September 13, TMZ claimed at the time.

The couple tied the knot again in front of friends and family at the luxury Montage Palmetto Bluffs resort in South Carolina on September 30, 2019.

The Biebers marked their fifth wedding anniversary last September with Instagram tributes to one another, with Hailey writing a short but poignant messaging, posting: '5. I love you.'

Justin left a longer message in homage to his partner, penning: 'To the most precious, my beloved. 5 years. You have captivated my heart. I know from the depths of my soul down to my bones that this journey with you will only exceed our wildest expectations. So let's keep dreaming big baby. Cheers to forever and ever. I love you with every fibre of my being. HAPPY 5TH YEAR ANNIVERSARY!!!'