Teen Mom 2 star Kailyn Lowry has given birth to her second child, a baby boy she and husband Javi Marroquin named Lincoln Marshall Marroquin.

"I am exhausted, but we are so excited and surprised by our new baby boy," Lowry told Us Weekly.

Lincoln was reportedly born on Saturday at 4:28PM, weighing eight pounds and six ounces.

The 21-year-old reality TV star and Marroquin, 20, announced in March they were expecting a baby.

The new baby is Marroquin's first, as Lowry already has a three-year-old son named Isaac from a previous relationship. Her ex-boyfriend and the father of Isaac, Jo Rivera, appeared with Lowry on Teen Mom 2 and her initial stint on 16 & Pregnant.

Lowry and Marroquin, a U.S. airman, got engaged in September 2012 and reportedly wed one year later on September 21 of this year.