Kailyn Lowry has finally given her third child a name. In an Instagram post over the weekend, which was shared nearly one month after the child's early August arrival, the "Teen Mom 2" star confirmed that she and her third baby daddy, ex-boyfriend Chris Lopez, have settled on the name Lux Russell for their child. She also revealed that the baby was born on August 5, 2017, at 3 a.m. on the dot.

Lux Russell was 7 lbs, 15 oz, and 19 3/4” long. "It only took us 7 weeks to decide a name," Lowry wrote in the caption of her post, also revealing that she waited until her son was eight weeks to make his name official with a customized baby blanket from Highway 3.

Kailyn Lowry announced her pregnancy in February

Amid tons of rumors claiming her third child was on its way, Lowry took to her official website to reveal that she was, in fact, expecting. Also at the time, Lowry said she had a change of heart about her previous decision, which noted that she was no longer willing to have more children.

After telling Javi Marroquin, her former husband, that she did not want to expand their family, Lowry divorced Marroquin and began dating Chris Lopez. Then, just months into their relationship, Lowry conceived a child and she and Lopez parted ways.

Although some believe Chris Lopez has been seen during episodes of "Teen Mom 2," it is hard to say whether he has or not.

That said, he may have been seen on the series with his face blurred out -- and he could have been the man who Marroquin caught at his home after returning home from his deployment in Qatar.

Kailyn Lowry and Chris Lopez are raising their son together

Lowry and Lopez's romance may have come to an end several months ago but when it comes to their co-parenting relationship, the former pair is very much intact.

In fact, Lowry and Lopez have been known to tweet to one another online and Lopez often speaks about his son with his fans and followers on Twitter.

In addition to Lowry's eight-week-old son Lux, Lowry is a mom to two older boys, seven-year-old Isaac Rivera, who she shares with ex-boyfriend Jo Rivera, and three-year-old Lincoln Marshall Marroquin, who she shares with ex-husband Javi Marroquin.

To see more of Kailyn Lowry, her growing family, and her co-stars, including Javi Marroquin, Jo Rivera, Jenelle Evans, Leah Messer, Briana DeJesus, and Chelsea Houska, tune into new episodes of "Teen Mom 2" season eight on Monday nights at 9 p.m. on MTV.