Sister Wives season 6
Kody and his legal wife Robyn TLC

Kody Brown and his legal wife Robyn welcomed their second child, a baby girl, on 10 January. The news was confirmed by TLC and Robyn through their social media accounts. The newest member is the 18th child of the polygamist family.

TLC revealed that the baby was born at the Brown family's Las Vegas home measuring 21.5 inches and weighing 9 lbs and 9 oz (9.5625 pounds). The network airs the reality show documenting the family's day-to-day life and the difficulties they face while managing a polygamist lifestyle.

The new parents shared the baby girl's pictures via TLC and are yet to decide on a name for her. The couple have a son named Solomon along with Robyn's three children from a previous marriage.

Click here to see the pictures of the Brown family's new bundle of joy. In one of the picture, all the sister wives can be seen smiling at the camera while Robyn is holding the baby.

Early last week, Robyn wrote on Twitter: "Two days away from my due date. We are all ready to meet Baby Sister! Trying to be patient but can't wait to see her sweet face. "

The 37-year-old reality TV star also revealed her anxiousness when she crossed the due date. On 8 January she tweeted: "Due date came and went. When is this little girl going to come?"

Earlier, Robyn slammed rumours that her polygamist family was on the verge of breaking up as Kody's first wife Meri was leaving the house. In one of her tweets in November, the reality star confirmed that Kody's first wife was not leaving the Brown household.

"When Meri Brown finally told me what was going on, I was angry that she had been victimized but also relieved that she wasn't leaving us." She later added that the eldest sister wife has finally moved on from the internet cheating she suffered. "It is good to have @MeriBrown1 back to her old self. She is stronger than ever & isn't letting this stupid thing beat her."

In one of the pictures released, Meri is seen posing with a big happy smile along with Christine, Janelle, Robyn and the newborn baby.