The couple, who recently celebrated their second wedding anniversary on 14th April, were kept waiting for their new arrival, who didn't appear until seven days after his due date of 12th April and after a 30-hour labour.
Understandably, Nick was getting impatient waiting for his son to arrive, tweeting on 13th April: 'Still no baby yet. Days away #excited#baby #daddy'
Still no baby yet. Days away ð‘¶ð¼ð³ #excited#baby #daddy— Nick Carter (@nickcarter) April 13, 2016
The celebrity pair have now revealed their son's name, and it's certainly an unusual one! They chose Odin Reign Carter, a name which Nick described as being 'very strong'.
Although he wouldn't reveal the choice beforehand, he revealed to ET: 'It's a very strong name,' noting that he was 'instructed by my wife to keep it under wraps.'
The couple held a rather unconventional baby shower at their home in LA on 2nd April, with Lauren, 32, revealing to People the reason behind the joint celebration.
'He just got off a tour, so I really wanted him to enjoy this next thing, which is to become a dad, and make it about him too and shower him with love and surprises,' she said.
The bash, which was attended by 50 guests, including Nick's Backstreet Boys bandmates Kevin Richardson and A.J. McLean, had a Game of Thrones theme: 'We love that show!' Nick told People. '[The best part is] seeing all the people that we love, all of our friends and family, supporting Nick and I, and all being together before this monumental event,' said Lauren.
It's been a busy time for Nick, who came second in the American dance competition Dancing with the Stars in November and is now looking forward to a possible Las Vegas residency with the Backstreet Boys.
Nick with his Backstreet Boys bandmembers
'We're doing a nine-show trial run,' he told People, adding if they do end up with a permanent schedule his wife and new son will 'absolutely' join him on the road. Congratulations to the new family!