Mark-Paul Gosselaar is preparing for his third offspring - his wife Catriona McGinn is pregnant with their first child.

The former "Saved By The Bell" star and the advertising executive got married in July, and their baby is due in September.

Gosselaar has two children with ex-wife Lisa Ann Russell - Michael, 9, and Ava, 6. The kids can't wait to welcome their new brother or sister.

The actor told "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 recently starred in the TV series"Raising the Bar," "Franklin & Bash" and "Don't Trust The B---- In Apartment 23." He has also appeared in several made-for-television films, including "Hide" and "12 Dates of Christmas."