How old were the actors in Bubù (1971)?

Bubu leaves his job in a bakery, forces his girl-friend into prostitution, and from then on lives out of the money she makes. The young couple find their place in the world of prostitutes and pimps, but the lack of perspective in their life - which is permanently haunted by the possibility of an incurable and fatal venereal infection - and the humiliations the girl endures strain their relationship and lead to conflicts.