He shared his happy news on Twitter late Monday night. "It's a boy!!!!!!!!" he Tweeted. "Please welcome Dominic Lopez to the world! Couldn't be happier...@CourtneyMLopez & baby are doing just fine."
The 39-year-old wasted no time celebrating the new addition to their family, too. "I am in heaven now...And in a bar. #CelebratingDominicLopez #BabyLopezNumber2," Mario Tweeted later.
Mario and Courtney already have one three-year-old daughter together named Gia, who wanted to find out the sex of her sibling even though the couple chose not to.
"She wants to know if it's a boy or a girl, but we don't know because we waiting to find out," Courtney told People recently.
Cheers to the happy family!
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Gallery | Hollywood's Biggest Dads