How happy can you be? is an attempt to make the practical manual – “Your guide to happiness” by using a modern, scientific approach: science, practical empirical attempts to measure happiness.
| Actor | Role |
|---|---|
 Line HatlandNarrator | Narrator |
| RRobert Biswas-DienerHimself | Himself |
| JJohn CacioppoHimself | Himself |
| EEd DienerHimself | Himself |
| SSonja LyubomirskyHerself | Herself |
| RRobert SchwartzHimself | Himself |
| RRuth VeenhovenHerself | Herself |
| JJoar VittersøHimself | Himself |