Teen Mom 2 star Chelsea Houska is officially a mother-of-two!

Chelsea gave birth to her and Cole DeBoer's baby boy, making her seven-year-old daughter, Aubree [from her relationship with Adam Lind] a big sister again.

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She shared the exciting news on her Instagram account, with this photo captioned, "Welcome to the world, sweet boy."

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Welcome to the world, sweet boy 💙

A post shared by Chelsea DeBoer (@chelseahouska) on

Cole shared the same snap on his account and wrote, "Welcome our perfect sweet miracle!"

Chelsea and Cole, who tied the knot on Oct. 1, 2016, announced they were expecting their first child together in July. She also revealed that after their little man was born, they would hold a larger wedding celebration so he can be part of it.

While there is no word yet on the little guy's name, they previously hinted that they would utilize a last name that could be used as a first name. The MTV star wasn't due to give birth until Valentine's Day, though her husband and father, Randy Houska, both predicted that he would arrive early.

The timing is interesting — considering her costar Jenelle Evans gave birth on Tuesday of this week to a baby daughter named Ensley — which was her third child and first with her current boyfriend, David Eason.

We can't wait until this all plays out on Teen Mom 2.

Congratulations to the growing family!

See how much the Teen Moms have changed over the years by scrolling through the gallery!