- Oh! Oh! Cleopatra (1931)
- Oh! What A Lovely War (1969)
- Oh, God! Book II (1980)
- Oh, Mr. Porter! (1937)
- Oh, Ramona! (2019)
- Oh... Rosalinda!! (1955)
- Ohm Shanthi Oshaana (2014)
- Oi voskoi (Thanos and Despina) (1967)
- Oi! Warning (1999)
- Ojii-san no Lamp (2011)
- OK baytong (2003)
- OK Jaanu (2017)
- Ok-hui-ui yeonghwa (2010)
- Oka! (2011)
- Okami kodomo no ame to yuki (2012)
- Okami Yo Rakujitsu O Kire (The Last Samurai) (1974)
- Okasareta Hakui (Violated Angels) (1967)