. ▁The ▁film ▁takes ▁its ▁name ▁from ▁the ▁black ▁cap es ▁worn ▁by ▁the ▁students ▁at ▁the ▁University ▁of ▁Co im bra . ▁The ▁film ▁was ▁an ▁enorm ous ▁success ▁at ▁the ▁box ▁office ▁in ▁both ▁Portugal ▁and ▁Brazil , ▁despite ▁criticism ▁in ▁Co im bra ▁that ▁dep ict ions ▁of ▁the ▁city ▁and ▁its ▁musical ▁tradition ▁were ▁not ▁accur ately ▁represented . ▁ ▁The ▁film ▁marked ▁the ▁debut ▁of ▁ ▁Am ál ia ▁Rod rig ues , ▁previously ▁known ▁as ▁a ▁radio ▁star . ▁The ▁film ' s ▁popular ity ▁led ▁produ cers ▁to ▁r ush ▁out ▁another ▁film ▁F ado : ▁The ▁Story ▁of ▁a ▁S inger , ▁which ▁was ▁lo os ely ▁based ▁on ▁her ▁own ▁life ▁story . ▁ ▁Cast ▁ ▁Am ál ia ▁Rod rig ues ▁as ▁Maria ▁de ▁Lis boa ▁▁▁ ▁Alberto ▁R ibe iro ▁as ▁José ▁Du arte ▁▁▁ ▁Art ur ▁Ag ost inho ▁as ▁Man ec as ▁▁▁ ▁Vas co ▁M org ado ▁as ▁Jorge ▁▁▁ ▁Bar ro so ▁L op es ▁as ▁C oca - B ich in hos ▁▁▁ ▁H umber to ▁Made ira ▁as ▁J á - C á - C anta ▁▁▁ ▁Ant ón io ▁Sac r amento ▁as ▁Judge ▁▁▁ ▁Gra ziel a ▁M endes ▁▁ ▁Jo aqu im ▁Mir anda ▁▁ ▁Fernando ▁Silva ▁as ▁C un ha , ▁the ▁pa wn bro ker ▁▁▁ ▁Man uela ▁Bon ito ▁ ▁Alfonso ▁Bran co ▁ ▁João ▁Cal az ans ▁ ▁C rem ilda ▁de ▁S ous a ▁as ▁Dan cer ▁▁