It's Mark-Paul Gosselaar!!!!
Story from PEOPLE ONLINE:
There’s a baby on the way for Mark-Paul Gosselaar.
He and and wife Catriona McGinn “are thrilled to announce they’re expecting their first child together in September,” theFranklin & Bash star’s rep tells PEOPLE exclusively.
Gosselaar, 39, wed McGinn, an advertising executive, last July in Santa Ynez, Calif.
Read more here: http://celebritybabies.people.com/2013/03/11/mark-paul-gosselaar-expecting-third-child/