Kailyn Lowry is finally sharing her newborn son's name with fans.

The 25-year-old "Teen Mom 2" star officially introduced son Lux Russell in an Instagram post Sunday, nearly two months after welcoming the infant with Chris Lopez.

"Lux Russell, 08/05/17," she captioned a slideshow of photos of her baby boy. "7 lbs 15 oz, 19 3/4" born at 3 am on the dot. It only took us 7 weeks to decide a name and 8 weeks to make it official."

Lowry had referred to her son as "Baby Lo" as she and Lopez decided on a name. She said in an interview with Us Weekly last week that she was trying out different monikers.

"I thought I had a name and I would refer to the baby as that name in text messages or say it," the star told the magazine. "And it didn't feel right so I kept trying a couple different ones and none of them felt right."

"I kind of have the one that I want to name him," she added. "But I haven't legally named him yet."

Lowry is also parent to 7-year-old son Isaac with ex-boyfriend Jo Rivera and 3-year-old son Lincoln with ex-husband Javi Marroquin.

She posted a picture with her three sons while attending a fall festival Saturday at Fifer Orchards in Wyoming, Del.

Reality TV World is now available on the all-new Google News app and website. Click here to visit our Google News page, and then click FOLLOW to add us as a news source!
"Getting a nice family pic with 3 kids isn't always as easy as one may think," the star confessed in the caption. "Baby Lo is 8 weeks old today & he got to experience his first fall festival."