 | Sergio Corrieri als Alberto |
 | Salvador Wood |
 | José Gallardo als Pedro |
| Raúl García als Enrique |
| Luz María Collazo als Maria / Betty |
 | Jean Bouise als Jim |
| Alberto Morgan als Ángel |
| Fausto Mirabal |
| Roberto García York als American Activist |
| María de las Mercedes Díez |
| Bárbara Domínguez |
| Jesús del Monte |
| Luisa María Jiménez Rodríquez als Teresa |
| Mario González Broche als Pablo |
| Tony López |
| Héctor Castañeda |
| Rosendo Lamadriz |
| Roberto Villar |
| Roberto Cabrera |
| Alfredo Ávila |
| José Espinosa |
| Rafael Díaz |
 | Isabel Moreno |
| Manuel J. Mora |
| Raquel Revuelta als The voice of Cuba |
| Aramís Delgado als (uncredited) |
| Raúl Gómez als Singer (uncredited) |
| Pepe Ramírez als (uncredited) |
| Enrique Pineda Barnet | Writer |
| Yevgeny Yevtushenko | Writer |
| Sergei Urusevsky | Cinematography |
| Yevgeni Svidetelev | Production Design |
| Mikhail Kalatozov | Director |
| Carlos Fariñas | Music |
| René Portocarrero | Costume Designer |
| Luz M. Cáceres | Makeup Artist |
| Vera Rudina | Makeup Artist |
| Nina Glagoleva | Editor |
| Enrique Fong | Special Effects |
| Vasily Pugachev | Special Effects |
| Vladimir Sukharizky | Special Effects |
| Boris Travkin | Special Effects |
| A. Vinokurov | Special Effects |
| Lidiya Tyurina | Assistant Editor |
