The participants in "7Up 2000" were:
* Andrew: A working-class boy from London who was diagnosed with dyslexia.
* Tony: A boy from a privileged background, who attended private school.
* Lynn: A girl from a working-class family who attended a girls' grammar school.
* Neil: A boy from a wealthy family who attended an exclusive boarding school.
* John: A boy from a working-class family who attended a grammar school.
* Paul: A boy from a working-class family who attended a comprehensive school.
* Symon: A boy from a working-class family who attended a grammar school.
* Jackie: A girl from a working-class family who attended a comprehensive school.
* Peter: A boy from a working-class family who attended a grammar school.
* Suzanne: A girl from a working-class family who attended a girls' grammar school.
* Bruce: A boy from a middle-class family who attended a grammar school.
* Nick: A boy from a working-class family who attended a comprehensive school.
* Katie: A girl from a working-class family who attended a comprehensive school.
* Sue: A girl from a working-class family who attended a girls' grammar school.
The film doesn't feature professional actors, it documents the lives of the participants as they are.