12-year-old Josh wishes he was 'big' and wakes up to find that overnight he has developed into an adult male (Tom Hanks). Kicked out of home by his mother, who doesn't believe his story, man-child Josh quickly gets a job developing new ideas for toys, with much success. He also finds himself successful with women - something he isn't quite ready to handle!

Arthur Bach (Dudley Moore) is a millionaire playboy who spends most of his life drunk, mollycoddled by cynical manservant Hobson (John Gielgud). Threatened with poverty by his grandmother unless he finally marries his socialite fiancée Susan (Jill Eikenberry), Arthur's response is to embark on an affair with penniless, working class waitress Linda (Liza Minnelli). John Gielgud won an Oscar for Best Supporting Oscar, and a sequel, 'Arthur 2', followed in 1988.

12-year-old Josh wishes he was 'big' and wakes up to find that overnight he has developed into an adult male (Tom Hanks). Kicked out of home by his mother, who doesn't believe his story, man-child Josh quickly gets a job developing new ideas for toys, with much success. He also finds himself successful with women - something he isn't quite ready to handle!