September 10, 2013 02:40 AM

Frank Micelotta/Invision/AP

It’s a boy!

Extra host Mario Lopez, 39, and his wife Courtney welcomed their second child, son Dominic, on Monday evening, Sept. 9 in Los Angeles, he announced via Twitter.

“It’s a boy!!!!!!!!!!!!!! Please welcome Dominic Lopez to the world,” he wrote. “Couldn’t be happier … Courtney and baby are doing just fine.”

The family’s newest addition, who weighed in at 7 lbs., 2 oz upon his delivery via c-section., is named after Courtney’s grandfather and will go by the nickname Nico. He joins big sister Gia Francesca, who turns three on Wednesday.

Since the February reveal that there was another baby on the way, Mario and Courtney have concentrated their efforts on soaking up time with their firstborn — including throwing her a princess-themed birthday party — as they prepared her for the baby’s big arrival.

“She’s pointing at the baby and saying, ‘There’s a baby in there,'” the doting dad told PEOPLE, adding their decision to keep the sex a surprise didn’t sit well with the soon-to-be big sister.

“She wants to know if it’s a boy or a girl, but we don’t know because we’re waiting to find out. That’s kind of tough sometimes — we just don’t know!”

But as Gia’s excitement grew, Courtney joked she wasn’t sure how much her toddler actually understood. “Gia kind of understands that there is a baby in my belly,” the mom-to-be said shortly after announcing her pregnancy. “She also told me our dog Julio has a baby in his belly — so who knows!”

As for regaining her body after baby, Courtney admitted to PEOPLE she’s hopeful she will shed the pregnancy pounds as quickly as she did following the birth of her first child.

“My husband is the most supportive man on the earth. He loves my booty,” she said in June. “I lost the weight pretty quickly the first time, so I’m praying it happens the second time around.”

— Anya Leon

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