Mark-Paul Gosselaar welcomes baby No. 3, first for wife Catriona

Mark-Paul Gosselaar has another mini Zack Morris on his hands.

The “Saved by the Bell” alum has welcomed a son with wife Catriona McGinn, her first child, his third (and second son). His name? Dekker Edward Gosselaar and he was born in Los Angeles on Monday.

“We are overjoyed with the new addition to our family,” the 39-year-old actor told Us Weekly. “We are madly in love with our little boy. He is healthy and just perfect -- all we could ask for.”

PHOTOS: The Hollywood baby boom

The “Franklin & Bash” star and his ad exec wife were married in July 2012 at a Santa Ynez winery. Gosselaar has a son named Michael, 10, and a daughter named Ava, 7, from his 14-year marriage to Lisa Anna Russell, which ended in May 2011.

The couple announced they were expecting last March, saying they were “all really excited for the arrival of our new addition,” Gosselar told People.

“We’ve always wanted a big family. The kids are looking forward to a little sibling, and are asking a lot of funny questions right now.”

McGinn has already had a bit of parenting practice with Gosselaar’s kids.

“Catriona’s great with my kids,” the actor said when he and McGinn first got engaged. “My kids absolutely adore her.”

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