Warren Buffett and Bill Gates launched an unusual campaign in June 2010: both agreed to donate half of their fortunes to charity. The filmmakers followed multi-billionaire Warren Buffett for 18 months, investigating his motives and talking to supporters and opponents of his initiative.
| Actor | Role |
|---|---|
 Warren BuffettHimself | Himself |
 Bill GatesHimself | Himself |
 Melinda GatesHerself | Herself |
| NNicolas BerggruenHimself | Himself |