The documentary addresses the project, which took 30 years to complete, about the recording of 44 songs created for each poem in Mensagem, one of Fernando Pessoa's most emblematic books.
| Actor | Role |
|---|---|
 André Luiz OliveiraSelf | Self |
| RRama de OliveiraSelf | Self |
| CCarlos Felipe MoisésSelf | Self |
| JJoão FerreiraSelf | Self |
 Teresa Rita LopesSelf | Self |
| PPedro SepúlvedaSelf | Self |
| JJorge UribeSelf | Self |
| AAntonio FeijóSelf | Self |
| AAna Paula MegianiSelf | Self |
| SSantiago NaudSelf | Self |
| AAntonio RisérioSelf | Self |
| RRoberto PinhoSelf | Self |
| RRichard ZenithSelf | Self |
| JJosé Paulo CavalcantiSelf | Self |
 Cida MoreiraSelf | Self |
 Mônica SalmasoSelf | Self |
 Raquel TavaresSelf | Self |
 Ney MatogrossoSelf | Self |
 Gilberto GilSelf | Self |
 António ZambujoSelf | Self |
 Zélia DuncanSelf | Self |
| MMário LúcioSelf | Self |
 Renato TeixeiraSelf | Self |
 Milton NascimentoSelf | Self |
| NNá OzzettiSelf | Self |
 Carlos do CarmoSelf | Self |
 BelchiorSelf (archive footage) | Self (archive footage) |
| AAndres ArtesiSelf | Self |
 Caetano VelosoSelf | Self |
 Carlinhos BrownSelf | Self |