The title character in Maria Nover (Sister Maria) is played by Eva Szorenyi. A convent-bred lass on the verge of taking her final vows, Maria falls in love with a handsome artist, portrayed by popular operatic baritone Sandor Sved. Due to a silly misunderstanding, she walks out on Sved and marries his best friend Paul Javor. The frustrated suitor quits the art world to become a world-famous concert singer. Years later, he returns to reclaim Maria, only to find that she's not only still a wife, but also a mother and a dedicated nurse. Gracefully bowing out of her life, the Pagliacci-like Sved continues his singing career to assuage his broken heart.
| Actor | Role |
|---|---|
 Éva SzörényiMária Berényi | Mária Berényi |
 Lili BerkyMary's mother - widow Berényi | Mary's mother - widow Berényi |
 Sándor SvédJános Kibédy | János Kibédy |
 Pál JávorMihály Ladányi - landowner | Mihály Ladányi - landowner |
 Gyula GózonDoctor | Doctor |
 Imre ApáthiTibike - János's friend | Tibike - János's friend |
 Tibor von HalmayMr. Vadász - the secretary | Mr. Vadász - the secretary |
| PPiroska VaszaryTeacher Zárdai | Teacher Zárdai |
 Gerő MályHousekeeper | Housekeeper |
| LLajos GárdayUncle Gyuri | Uncle Gyuri |
| ÁÁgi DonáthA student of the convent | A student of the convent |
 Hilde von StolzKlári Halmay, widow of a German impresario | Klári Halmay, widow of a German impresario |
| LLajos Köpeczi BoóczDistrict Judge | District Judge |
| JJózsef BerkyGypsy | Gypsy |
| BBéla FáyBandi | Bandi |
| GGyörgy HajnalPostman | Postman |
| GGyula Justha journalist | a journalist |
| KKarola ZalaHead of the Institute | Head of the Institute |