The "X Factor" host's wife gave birth to their second child on Monday.

Mario Lopez and his wife, Courtney, have welcomed their second child, a baby boy.

The former Saved by the Bell star's wife gave birth Monday to a baby boy, Dominic, Lopez announced on Twitter. (See the embedded tweet below.)

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The baby weighed in at 7 lbs., 2 oz., according to Extra, which Lopez co-hosts alongside Maria Menounos.

The X Factor host and his wife already have a daughter, Gia Francesca, who turns 3 on Wednesday.

The couple were married in December.

It's a boy!!!!!!!!!!!!!! Please welcome Dominic Lopez to the world! Couldn't be happier... @CourtneyMLopez & baby are doing just fine... :)

— Mario Lopez (@MarioLopezExtra) September 10, 2013