The Fixer Upper stars have named their new baby Crew Gaines.
"Our baby boy, Crew Gaines, is here and we couldn't be more in love. He made an unexpected (and speedy) entrance into the world two and a half weeks early - which is fitting given he was a sweet surprise from day one," Joanna captioned an Instagram photo collection she shared late Saturday evening.
"Thank you for all your thoughts and prayers. We are so grateful."
"And then there were 5.. The Gaines crew is now 1 stronger!" he wrote on Twitter.
"10 beautiful toes and 10 beautiful fingers all accounted for, and big momma is doing great! #blessedBeyondBelief."
The Fixer Upper stars had announced they were expecting their fifth child in January. Chip and Joanna have four prior children: 13-year-old son Drake, 12-year-old daughter Ella, 12-year-old son Duke and 10-year-old daughter Emmie
The pair had starred on the series since it debuted with a pilot in May 2013 and began airing its first full season in April 2014.
During press interviews about their shocking decision, Chip said he was missing spontaneity in his career while Joanna felt time with their growing children was slipping away too quickly.
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The couple had insisted, however, their marriage was not on the rocks.
In a November interview with ABC News about why they pulled the plug on their popular HGTV reality show, Chip had said "We had four babies right before the show started and then we've had zero babies since the show started. For me, I'm really excited to go back and try to maybe make some more babies."
However Joanna didn't seem to be on the same page, blurting out a "maybe" after Chip's comments and saying they had "different answers" for why Fixer Upper was ending.