Ari Perilstein/Getty Images for Feld EntertainmentIt's a girl!
Mark-Paul Gosselaar just spilled some major news on Twitter, that his wife Catriona McGinn gave birth to their daughter last night!
"So in love with our new baby girl, Lachlyn! Born last night 2/17 Mum and baby are healthy and happy. 2 boys, 2 girls, too perfect!," he wrote earlier this morning.
The newest Gosselaar arrival makes four for the former Saved By the Bell star, who first announced that his wife was pregnant late last year.
"It's something we're really excited about and we've been planning for awhile," he told People magazine during the Disney on Ice Presents Let's Celebrate! event in Los Angeles.
He also shared that he and McGinn have been preparing their home for the newborn for some time now, saying, "We're doing some tweaks to the house and some things to prepare for the room. But we're old pros at this now. How do you prepare other than get as much sleep as you can?"
Lachlyn's arrival marks the actor's second child with McGinn, his second wife, who gave birth to their son Dekker Edward back in 2013.
Gosselaar is also a proud papa to Ava Lorenn, 8, and Michael Charles, 10, from a previous marriage.
Congratulations to the entire Gosselaar family!