Corey Blechman

Dominick and Eugene are twins, but Dominick is a little bit slow due do an accident in his youth. They live together... (imdb)

In yet another modern-dress version of The Prince and the Pauper, Joey Lawrence plays Ricky Prince, a famous pop star who has grown tired of the spotlight and the pressures of fame. Ricky makes the aquaintance of Ralph Bitondo (also played by Joey Lawrence), a pizza delivery boy who looks almost exactly like Ricky -- so much so that the two decide to trade identities for a while... (movies.nytimes.com)

Billy Grier (Ralph Macchio) is a typical teenage boy who discovers he has a rare disease that causes him to age at an incredibly rapid rate.

Bill, a retarded man, ventures out into the world for the first time, having spent most of his life in a dreary inner city institution.. (imdb)

A college professor, his wife, and daughter go the the wilds of Africa to live, and study the rare white lions of the region.