Nick Carter and his wife are expecting their first child together.
The Backstreet Boys singer and fitness expert and actress Lauren Kitt - who tied the knot in 2014 - will welcome a baby next year.
A source told Us Weekly: "They are so happy and overjoyed. They've been trying and waiting for such a long time."
Nick and Lauren met, 32, in 2013 and the 35-year-old singer admitted she changed his opinion on marriage after he had previously vowed never to tie the knot.
Meanwhile, Nick - who had a troubled childhood and is estranged from his parents - has credited his bandmates, A.J. McLean, Howie Dorough, Kevin Richardson and Brian Littrell, with giving him the family that he never had.
The 'Dancing With the Stars' contestant said: "They became the family that I didn't really have at that time. All the other guys had great families and great morals, and things that I could connect to and learn from, and really reflect with my own family. I was really able to learn from the guys."
Asked to pinpoint the troubled spot in his childhood, he said: "It was a lot about money and all the things we didn't have. It was just a lot of tension within the household and alcohol was definitely always around us all the time, so I was kind of tortured for so many years and had a lot of stress. I saw that I couldn't save them or actually have that family.
"In a way though, I was saved by the guys and God gave me a new life."