Fans are already getting excited for the television comeback of "Sister Wives" Season 7 this year. And the lives of the Browns, TLC's polygamous family, are getting more interesting with the latest addition of Kody and Robyn's daughter, who was born on Jan. 10.

The new baby is the couple's second child as they are also proud parents to their 3-year-old son, Solomon. But for Kody, the baby is his 18th offspring.

As previously reported, Robyn and Kody's daughter was born three days after Robyn's expected due date and with the help of the couple's midwife April Karmani. During the delivery, the couple were accompanied by Robyn's parents, Paul and Alice Sullivan.

"We are happy and blessed to welcome the newest addition to the Brown family!" Robyn said, as per Radar Online.

"'Baby Sister' is already opening her eyes and seems to love listening to all the voices of her big family talk around her," Robyn added. "It was such a beautiful moment when the family was all gathered together to meet our newest sweet addition!"

While it was initially reported that the couple has not named their baby yet, TLC recently announced that the Brown family has finally chosen a name for the newest member of the clan and it's Ariella Mae Brown.

"The Brown family has chosen a name for their adorable baby girl: Ariella Mae Brown," the network announced. "She was born on Sunday, January 10th at 10:10pm in their Las Vegas home, measuring 9 lbs and 9 oz. and 21.5 inches. Ariella received special visits from each of the sister wives who are all overjoyed and bursting with love for the newest Brown family addition."

Aside from celebrating Ariella's birth, the cast of "Sister Wives" Season 7 also celebrated Meri Brown's birthday and TLC kicked off the party with a Twitter birthday message. Robyn also wrote a sweet birthday message for her sister on Twitter.

Meanwhile, here are 5 things you never knew about the main cast of "Sister Wives" Season 7, as listed by She Knows.

1. Janelle Brown was obsessed with Native American culture.

Due to her Native American culture obsession, Janelle pitched a tipi on the property of Kody's parents in Wyoming in the '90s.

2. Robyn Brown's ex-husband is related to the family?

David Preston Jessop, who is Robyn's ex-husband, is her sister Christine's first cousin as well as Kody's third cousin. Jessop is also related to Meri through one of her father's other wives.

3. Janelle Brown was not raised in a polygamous family setup.

Janelle is the only Brown wife who was not brought up in a polygamous family.

4. Christine Brown suffered from postpartum depression.

After the birth of her daughter Truly in 2010, Christine reportedly suffered from postpartum depression.

5. Meri Brown had been married to Kody for 25 years before their divorce.

Meri Barber married 22-year-old Kody Brown in April 1990, when she was only 19. Before their divorce last year, the couple had been together for 25 years. Meri was also responsible for Janelle and Kody's meeting. And the ex-couple have been Janelle's chaperones on a wilderness trip, which took place on the summer after she graduated from high school. And for three years after marrying Janelle, Kody lived with her and Meri in a cramped mobile home in Wyoming.

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