Actor Mark-Paul Gosselaar is set to become a father again - his new wife is pregnant with their first child.

The former Saved by the Bell star wed advertising executive Catriona MCGinn last July (12), and now they are preparing to become parents in September (13).

The actor is already a dad to son Michael, nine, and six-year-old Ava, from his previous marriage to Lisa Ann Russell, and he reveals the children are looking forward to welcoming a new sibling.

Gosselaar tells, "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."