In their new reality series, "sTORIbook Weddings," Tori Spelling and husband Dean McDermott plan one extravagantly themed wedding each week for eight lucky couples. The show, which is a spin-off of "Tori & Dean: Home Sweet Hollywood," premiered April 6 on the Oxygen channel.

The couple joined Mario Lopez at The Grove on Wednesday, where Lopez asked Tori to share her expertise on what kind of gown Kate Middleton would probably be wearing for the royal wedding. Spelling replied, "I see her as sort of a modern princess, so modern fairytale... long, traditional huge train with rough edge ruffles, and a long veil. Maybe a little color somewhere."

See Who Else is Pregnant!

Pregnant for the third time, Spelling hinted that she and Dean may want more than three children. "Maybe we'll want a fourth, we'll see," she said. Fans at The Grove asked if the couple had thought of baby names yet and McDermott replied, "You mean aside from Mario?"

Another fan wanted to know what their motivation was for becoming wedding planners. Tori explained, "Well it's no secret that if you watch 'Home Sweet Hollywood,' I love to throw parties - I'm a party planner at heart. We were like, 'How can we have fun in this business and do it on someone else's dime,' so we were like, 'Let's throw other people's weddings.' We planned a few friends' weddings and said let's do it on TV."

Catch the latest episode of "sTORIbook Weddings," tonight at 10:00/9:00C.

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