The Kids Stay in the Picture

No matter how well they pout and grin, there's one thing all child actors have to be able to do: relax. If you place an ordinary kid opposite Mel Gibson or Susan Sarandon and yell "action," he'll get as stiff and shaky as a screen door in a gale. Rory and Kieran Culkin, younger brothers of Home Alone star Macaulay, don't know from stiff. In this month's Igby Goes Down, in which they play the same prep-school rebel at different points in his life, they seem as at ease on camera as most people are on their couch.

Rory, 13, who...

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