Baby on board!

Tori Spelling and hubby Dean McDermott are expecting their third child! The actress and reality star, 37, announced her baby news via Twitter Monday 

"I know there's been a lot of speculation, so I wanted everyone to hear from me. . .it's official. . . Dean & are PREGNANT!!!!"

PHOTOS: Tori and Dean renew their vows

Married since 2006, Spelling and McDermott, 44, have two children together: son Liam, 4, and daughter Stella, 2.

The 90210 vet concealed her growing baby bump in NYC on Monday, where she and McDermott were promoting their new Oxygen reality series sTORIbook Weddings. The famous couple were coy with about expanding their brood.

PHOTOS: Stylish star moms on the go

"We definitely [want more kids]," Spelling admitted.

"We want a couple more," McDermott added. So do little Liam and Stella, who "want [a younger sibling] really bad," McDermott said. "They love babies!"

PHOTOS: Tori and other celebs' supportive BFFs

"They ask us every day!" Spelling added. "It's so funny!

Best part about parenthood? "Every second!" Spelling cooed.

"It's ever-changing," her hubby added.

"It's challenging, but every second is amazing," Spelling told Us in August 2010: "I'm passionate about everything in my life. Obviously my family and my kids are my priority. I want to be that stay-at-home mom, but I want to build an empire at the same time."


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