Photo Credit: Denise Truscello/WireImage/Getty Images)

Mario Lopez's daughter, Gia, officially has a baby brother.

The "Extra" host, 39, announced the birth of his and wife Courtney Lopez's son Dominic Monday night on Twitter.

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

With Gia's third birthday Wednesday, the little girl will now have a little brother to watch out for as her big gift.

Mario Lopez Spends Quality Time With Daughter

An hour after his late-night announcement, Lopez followed up with another tweet, letting the world know he was making a toast to his new bundle of joy.

"I am in heaven right now…. And in a bar," he added with #CelebratingDominicLopez and #BabyLopezNumber2 hashtags.

Lopez and his wife became engaged at the end of 2011 and married in December in Mexico.