'Teen Mom' star Amber Portwood gives birth to son

May 8 (UPI) -- Teen Mom OG star Amber Portwood is a mom of two.

The 27-year-old television personality took to Instagram Tuesday after welcoming a baby boy, James, with boyfriend Andrew Glennon.

"So excited to announce the birth of our son!" Portwood captioned a photo of herself with Glennon.

Us Weekly reported Portwood gave birth at 1:39 a.m. The reality star had confirmed in a tweet Monday afternoon she was going into labor early.

"He's coming!!" she wrote.

Portwood is also parent to 9-year-old daughter Leah Leann with ex-fiancé Gary Shirley. She and Glennon started dating in 2017 after meeting on the set of Marriage Boot Camp, where Glennon worked on the show's crew.

"The best thing that came out of [the show was] meeting Andrew," Portwood said in an interview with E! News in April. "He makes me the happiest."

Portwood said she and Glennon are excited to start a family but are not talking about marriage.

"Right now, we're happily living together and seeing where everything goes," she said.

Portwood came to fame on the MTV series 16 & Pregnant before starring on Teen Mom. The show co-stars Catelynn Lowell and Maci Bookout, and completed a seventh season in April.