Tori Spelling and Dean McDermott welcome a baby boy

Tori Spelling and Dean McDermott welcomed a fourth baby Thursday evening, making it two boys and two girls in their well-televised family.

Finn Davey joined Liam, Stella and Hattie in the McDermott clan at 5:39 p.m., weighing 6 pounds, 6 ounces and measuring 20 inches.

The fact that Finn was a boy was news to Spelling and her husband on Thursday.

PHOTOS: Hollywood’s baby boom

“It’s the biggest surprise you can ever get in your life,� Spelling told the Ministry on Tuesday, while she was in full pregnancy mode at the Boys & Girls Club of Burbank with Dean, Liam and Stella, busting a little kiddie boredom.

“We thought for sure Stella was a boy. It was an amazing surprise that we thought we would never be able to duplicate -- so we tried it again!�

Just shy of 1 year old, Hattie’s still a little too young to have been there helping the rest of the gang build a Sport Court for the club and plant flowers.

“She would just want to gnaw everything,� said the “Craft Wars� star. “She’s got those four teeth, and she thinks she can chew the world.�

Spelling said the Lunchables “Never Be Bored Again� campaign was “so organic to our family� as they’re always doing things like crafting to improve hand-eye coordination, and it was easy for Mom to explain that they’d be helping other kids.

For each boredom-busting photo submitted now through Oct. 15 to its Facebook page, Lunchables will donate $1 to the Boys & Girls Clubs of America, up to $100,000, she said.

So will the family continue to grow? Spelling said she loves, absolutely loves, being pregnant. “It’s a moment in your life, another moment you can’t get back.� Still, she says, four’s the limit for the McDermott clan.

“I would never say never, but ... no.�

And though she stayed in the public eye right up to delivery this time around, one job she had to pass on was the Old Navy ad that’s currently starring old “90210� buds Jennie Garth, Luke Perry and Jason Priestly.

“I was so bummed� about having to turn down the gig, she said. “It was in New York and I was so pregnant! I would love to do one, though.�

ALSO:

Tori Spelling is pregnant (again!) with baby number 4

Tori Spelling crashes car at her kids’ school, tweets anger at paparazzi

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PHOTOS: Celebrity portraits by The Times