Tori Spelling and husband Dean McDermott are expecting a new addition to the family.

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The pair are proud parents of four children: Liam, 9, Stella, 8, Hattie, 5 and Finn, 4 – plus 18-year-old Jack from McDermott’s previous marriage. Spelling, 43, revealed the news to People and said the whole thing caught the couple off guard: “Dean was saying, ‘We just got Finn out of diapers; I thought we were in the clear!’… For the first time this year, they’re all in school. So it’s like, wow. We’re basically starting over.”

And according to McDermott, they might need a new car just to fit all these kids: “We need a Sprinter van!”

Spelling confirmed the news on Twitter.

The two reality stars have had well-publicized ups and downs in their marriage, but Spelling believes the two are meant to be: “This baby happened at the best time… Nothing is ever perfect, but I’m so madly in love with my husband and with our kids. The idea of adding to that is such a blessing.”

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Spelling and McDermott recently celebrated their 10th anniversary in Paris.