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Actor Mark-Paul Gosselaar, 39, and wife Catriona McGinn, an advertising executive, are expecting their first child together this September.

Gosselaar is a father to two children with ex-wife Lisa Ann Russell. He spoke to Us Weekly about the new addition to his family. "We are all really excited for the arrival of our new addition. 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."

Gosselaar gushed about his wife to Us Weekly, "Catriona's absolutely gorgeous. She's stunning, and she takes my breath away!"

The actor is known for playing high school hunk Zach Morris in "Saved By the Bell" and most recently, he stars as Peter Bash in TNT's "Franklin and Bash."