Teen Mom 2 star Kailyn Lowry has welcomed a baby boy with her husband Javi Marroquin. Lowry gave birth to a son, Lincoln Marshall Marroquin, on Saturday, Nov. 16.

Lincoln weighed 8 pounds, 6 ounces and joins older brother Isaac, 3, who Lowry shares with ex-boyfriend Jo Rivera.

"I am exhausted, but we are so excited and surprised by our new baby boy,” the MTV reality star told Us Weekly.

Lowry, 21, married Marroquin in September of last year. They celebrated again in September of this year for their 1-year anniversary at Adventure Aquarium in Camden, New Jersey.

Huffington Post notes Lowry dated Marroquin for a year before they got married.

Lowry documented her first pregnancy on the MTV shows 16 & Pregnant and Teen Mom 2, showing her troubled relationship with Rivera and eventually meeting Marroquin.

She thanked her well wishers on Twitter after giving birth, writing “Thank you all!” She then posted a picture to Instagram of a breast feeding brochure.

image: MTV