"Teen Mom 2" star Jenelle Evans is now a mother of two.

The reality TV star and boyfriend Nathan Griffith just welcomed their first child together on June 30, the two announcing their son Kaiser's birth with an adorable Twitter photo of the baby's feet.

Both Evans and Griffith have children from previous relationships -- Jenelle has son Jace, Nathan is father to daughter Emery -- but don't have full, legal custody of those kids.

"We know we can do this," Jenelle told MTV in February. "Everyone thinks that, 'Oh, well, they both don’t have custody of their children' …well, it doesn’t matter. We both know we didn't really get the opportunity to even try to raise our children to prove to people that we could."

After giving birth, she also tweeted "Idk what I would I do without @GroundLevelUp . He means so much to me. this is true love."

As for the name Kaiser, Evans says they were looking for something "unique."

"We were basically searching for baby names on the Internet, and we came up with a bunch of different unique ones," Evans told Us Weekly. "We didn’t want something that everyone else had or had even heard before, even us. So we wanted something different, and we ended up looking up Kaiser."

What do you think of the baby name ... and their decision to have a child together? Sound off below!

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