9021-oh, yeah!

Beverly Hills, 90210 star Ian Ziering and wife Erin Ludwig welcomed baby daughter Penna Mae on April 25, according to Us Weekly.

This is the couple's second child.

"We are ecstatic," Ian tells People.

It will be easy for them to remember their new baby's birthday, since their two-year-old daughter Mia was also born on April 25!

“We didn’t plan it!” the 49-year-old star says of the mutual birthday. “Mia was born a week late, and Penna was a week early.”

Earlier this month, Ian — who has also appeared on Dancing with the Stars — made it clear how thrilled he was to have a little one on the way.

"We are so excited to have another baby!" he tweeted recently.

Ian has admitted to hoping for a boy initially, but he said he came around quickly to the idea of adding another member of the fairer sex to his brood.

"At the moment I found out what sex the baby was, there was a little time of disappointment, but there are just as many reasons to have a girl as to have a boy," he says. "Spending two years with Mia showed me that.”

This is proving to be a busy time for Ian, who will be joining the Chippendales strip show in Las Vegas soon for a four-week run.

Ian is best known for playing fun-loving Steve Sanders for ten seasons on Beverly Hills, 90210.

Congrats to the happy family!

Source: Us Weekly, People