"Sister Wives" Robyn Brown Pregnancy
Robyn Brown (fourth from left), pictured with her family from the hit TLC series "Sister Wives," shares an updated on her pregnancy with fans. TLC/Raquel Werner

In just a few days, “Sister Wives” star Kody Brown will welcome his 18th child into the world when his fourth wife, Robyn, gives birth to the plural couple’s second baby together. The expectant mother took to Twitter on Tuesday, sharing an update on her pregnancy moments before her due date arrived.

And it looks like Robyn isn’t the only one of Kody’s wives anxious to meet the newest addition to the Brown clan. Meri, Kody’s first wife, responded to Robyn’s tweet, revealing her excitement to meet the baby set to join the Browns' big, rambunctious brood.

“So excited to met her!!” Meri wrote in a tweet.

Kody and Robyn announced that they were expecting another child together in June. The couple has a son, Solomon, who was born in 2011, and three child from Robyn’s previous marriage, Dayton, Aurora and Breanna, who Kody adopted in 2015.

“We are so happy to announce an eagerly expected new member of the Brown family,” the duo told People magazine in a statement. The twosome divulged that their child would be due on Jan. 7 – making their little bundle a Capricorn.

"Sister Wives" Robyn and Kody Brown Expecting
"Sister Wives" stars Kody and Robyn Brown are expecting their second child together in January. TLC/Raquel Werner

During Season 6 of the hit TLC series “Sister Wives,” the happy couple unveiled the gender of their baby during the family’s Alaska vacation. The big announcement was made by the Browns' two youngest members, Solomon and Truely, who ripped open presents revealing the sex of the baby.

“It’s a girl!” the daughter of Kody’s third wife, Christine, shouted while opening up a box stuffed with a pink doll inside.

The family was ecstatic to learn a little girl was joining the clan – especially Kody who noted that “it’s time for a girl in the family.”