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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PETER BILLINGSLEY

Then: He memorably played Ralphie, the bespectacled kid in the holiday classic A Christmas Story, whose life would be complete if only he had a Red Ryder BB gun.