"The whole family is so excited," the reality star tells PEOPLE
Credit: Fame

It will be a girl for Sister Wives stars Kody and Robyn Brown!

“The whole family is so excited for our new baby girl,” Robyn tells PEOPLE. “So many of them guessed ahead of time it was a girl.”

The couple who live a polygamous lifestyle along with Kody’s three other wives and their combined 17 children already share a son together, Solomon, but will welcome their baby girl on Jan. 7.

The sex of the couple’s baby was revealed on Sunday’s episode of Sister Wives.

“She kicks constantly and responds well to all the attention she gets through my belly,” says Robyn. “We can’t wait until she gets here!”

It’s been an exciting time for the family who recently revealed the news that Kody legally adopted Robyn’s three children from a previous marriage in June.

“Usually when a plural family goes into a court room they are tearing apart a family so we were really nervous going in,” says Robyn. “But here we were the whole family and we were uniting our family. It was really cool for us. Very much a validation of our family.”