Sneak Peek! Child Stars: Then & Now

Find out where Kirk Cameron, Blossom's Mayim Bialik, the Charles in Charge girls and more child stars are in this excerpt from PEOPLE's new book, in stores June 23!

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TARAN NOAH SMITH

Now: At 17, Smith wed 32-year-old Heidi Van Pelt. Since their 2005 split, the couple have battled over the future of their vegan cheese company, Playfood. Still, the business is thriving. "We're at the stage where it's the equivalent of a band signing to a major label," says Smith, now 25. He's also turned activist, joining actress Daryl Hannah to promote her green-living site, DHLoveLife.com.