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Kid cameos

Maude and Iris Apatow – Despite being rated R for crude language and nudity, Judd Apatow's new flick “This is 40” is a true family affair. The mid-life crisis comedy stars Apatow’s real-life wife Leslie Mann and two daughters Maude and Iris Apatow... oh, and Paul Rudd, too (who might as well be a member of the family, having starred in so many Apatow productions). Maude and Iris also appeared in Apatow’s 2007 comedy “Knocked Up,” which “This is 40” is a “sort of sequel” to. It would appear that “funny” is in the young Apatow girls’ blood, as the sisters manage to hold their own against some serious comedy heavyweights in the film. But as the next person on our list demonstrates, putting your kids in the movies can sometimes backfire terribly.

Famous kid cameos

Many child actors are thrust into the spotlight by parents trying to live vicariously through their children. But others already have parents in show business - very famous ones at that - and end up in the movies because they just happened to be around and available. Here are some famous kids who made memorable cameo appearances in their parents' movies. --Will Perkins