"....GUESS WHAT! A sweet baby girl will be joining the DeBoer clan in a few short months! We could not be more excited," the pregnant reality star wrote on a sonogram photo.
Cole captioned his photo, "This proud dad is getting a new Bow...and it’s nailed my heart @chelseahouska."
The fan favorite couple welcomed their first child, a son Watson, in January 2017.
Chelsea is also the mother of her 8-year-old daughter, Aubree, whom she shares with ex-boyfriend, Adam Lind.
Chelsea's sister Melissa gushed over being an aunt again and revealed the baby girl is due this summer.
The two exchanged vows in October 2016 in a very small and private ceremony.
One year later, the celebrated their anniversary with a party surrounded by family and friends.
Recently in January, they celebrated Watson's first birthday. Time is flying by!
What do you think Chelsea and Cole will name their daughter? Let us know your thoughts!