Life Is a Trumpet has a loose jazz musician as the groom, a butcher as his father, and two families of different backgrounds whose members are not as different as one might expect.
| Actor | Role |
|---|---|
 Bojan NavojecBoris | Boris |
 Iva BabićJana | Jana |
 Mirela BrekaloMarija | Marija |
 Zlatko VitezZdravko | Zdravko |
 Ksenija MarinkovićKlara | Klara |
 Goran NavojecDragec | Dragec |
 Filip ŠovagovićSlaven | Slaven |
 Bogdan DiklićSvećenik | Svećenik |
 Filip KrižanPiko | Piko |
 Tara RosandićKonobarica | Konobarica |
| IIvan MagudŠef sale | Šef sale |
| IIvan OžegovićRedar #1 | Redar #1 |
| NNikola BarišićRedar #2 | Redar #2 |
| NNika BurđelezKolegica s posla | Kolegica s posla |
| SSrećko KneževićNot listed | Not listed |