Oh, Brother

On Justin Berfield, left: Stussy cotton shirt, $50, at Stussy, Los Angeles, and Ron Herman/Fred Segal Melrose, Los Angeles, over James Perse cotton T-shirt, $52, at Maxfield, Los Angeles, Bloomingdale’s and American Rag Cie, Los Angeles, with Stussy cotton cargo pants, $56,at Stussy, Los Angeles, and Ron Herman/Fred Segal Melrose, Los Angeles. Royal Elastics tennis shoes for X LARGE. On Christopher Kennedy Masterson, right: Helmut Lang cashmere sweater, $520, at Barneys New York, Beverly Hills, over Gap cotton T-shirt, $19.50, at Gap stores, with Levi’s cotton-denim vintage jeans, $40, at Andrew Dibben, Los Angeles. Puma Advantage tennis shoes. Opposite, on Frankie Muniz: Ralph Lauren Childrenswear cotton shirt, $45, and Ralph Lauren Childrenswear silk tie, $49.50, at Polo Ralph Lauren, Beverly Hills.

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Emporio Armani wool-mohair turtleneck sweater, $248, at Emporio Armani, Los Angeles and Costa Mesa. Opposite: on Justin: Modern Amusement long-sleeve cotton-lycra T-shirt, $44, at KBond, Los Angeles, Fred Segal, Santa Monica, and Modern Amusement store, Costa Mesa, with James Perse cotton side-pocket pants, $168, at Maxfield, Los Angeles, Bloomingdale’s and American Rag Cie. Puma Easy Rider tennis shoes. On Frankie: Ralph Lauren Childrenswear cotton polo shirt, $30, at Polo Ralph Lauren, Beverly Hills, with Stussy pants with blue piping, $44, at Stussy, Los Angeles, and Ron Herman/Fred Segal Melrose, Los Angeles. Royal Elastics tennis shoes for X LARGE.

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On Justin: Stussy cotton shirt, $54, at Stussy, Los Angeles, and Ron Herman/Fred Segal Melrose, Los Angeles, over Emporio Armani polyester-viscose T-shirt, $98, at Emporio Armani, Los Angeles and Costa Mesa, with X LARGE cotton chinos, $76, at X LARGE, Los Angeles. On Christopher: Missoni cashmere polo sweater, $1,085, at Barneys New York, Beverly Hills, with James Perse cotton refined pant, $165, at Maxfield, Los Angeles, Bloomingdale’s and American Rag Cie. On Frankie: X LARGE cotton T-shirt, $22, at X LARGE, Los Angeles, with Gap Kids carpenter pants, $29.50, at Gap Kids stores. Opposite: Modern Amusement lamb’s-wool hooded sweater with cotton-jersey lining, $125, at KBond, Los Angeles, Fred Segal, Santa Monica, and Modern Amusement Store, Costa Mesa, with Gap Kids cotton-denim jeans, $59, at Gap Kids stores.

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‘My mom does all my shopping, but GAP, Old Navy and Reebok are my favorites.’: Frankie Muniz, 14, who plays Malcolm

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‘I don’t care for polyester and bell bottoms or super-tight and jumbo-baggy.’: Justin Berfield, 14, who plays Reese

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‘I consider myself fashionable if I can find a shirt and shoes that don’t clash.’: Christopher Kennedy Masterson, 20, who plays Francis

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Styled by Michael Cioffoletti; grooming: Debra Ferullo/Artists by Timothy Priano; wardrobe assistant: Michelle Tomaszewski; interviews by Tyler Reeb