USA
A sly business manager and two wacky friends of two opera singers help them achieve success while humiliating their stuffy and snobbish enemies. - IMDb
| 3 Ahbap Çavuşlar Operada |  Turkey |
| En aften i operaen |  Norway |
| Een avond in de opera (informal literal title) |  Netherlands |
| Botrány az Operában |  Hungary |
| Galakväll på operan |  Sweden |
| Halløj i operaen |  Denmark |
| Ilta oopperassa |  Finland |
| Lyla B'Opera |  Israel |
| Die Marx Brothers in der Oper (reissue title) |  West Germany |
| Mia nyhta stin opera (transliterated title) |  Greece |
| Một Đêm ở Nhà Hát |  Vietnam |
| Naktis operoje |  Lithuania |
| En natt på operan | Finland |
| A Night at the Opera |  Canada |
| A Night at the Opera |  United Kingdom |
| A Night at the Opera |  Ireland |
| A Night at the Opera |  India |
| A Night at the Opera |  New Zealand |
| A Night at the Opera | USA |
| A Night at the Opera |  South Africa |
| A Night at the Opera |  Australia |
| A Night at the Opera | Canada |
| Una nit a l'òpera |  Spain |
| Noc v opere |  Czechoslovakia |
| Noc v opeře | Czechoslovakia |
| Noc w operze |  Poland |
| Una noche en la opera |  Mexico |
| Una noche en la ópera |  Argentina |
| Una noche en la ópera | Spain |
| Una noche en la ópera (original subtitled version) |  Uruguay |
| Una notte all'opera |  Italy |
| O noapte la opera |  Romania |
| Skandal in der Oper | West Germany |
| Skandal in der Oper | West Germany |
| Skandalon stin opera (transliterated title) | Greece |
| Uma Noite na Ópera |  Brazil |
| Uma Noite na Ópera |  Portugal |
| Une nuit à l'opéra |  Belgium |
| Une nuit à l'opéra |  France |
| Μια νύχτα στην όπερα | Greece |
| Οι αφοί Μαρξ στην όπερα (reissue title) | Greece |
| Вечір в опері |  Ukraine |
| Вечер в опере |  Russia |
| Вечер в опере |  Soviet Union |
| Една нощ в операта |  Bulgaria |
| Ноћ у опери |  Serbia |
| オペラは踊る |  Japan |
| 歌剧院之夜 |  China |
| 歌劇院之夜 |  Taiwan |
| 歌台三怪杰 | China |
| 歌声俪影 | China |
| 歌聲儷影 | Taiwan |
| 歌臺三怪 |  Hong Kong |
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Dolly Blackburn | Little Girl watching Harpo playing |
