- Oasis
- Obscene: A Biography of the Life and Career of Renowned Publisher Barney Rosset
- October Kingsley
- Ol Parker
- Olatunde Osunsanmi
- Ole Bornedal
- Ole Christian Madsen
- Oliver Hill
- Oliver Hirschbiegel
- Oliver Irving
- Oliver Stone
- Olivier Assayas
- Olivier Dahan
- Olivier Dahan [La Vie en Rose]
- Olivier Ducastel
- Olivier Megaton
- Ondi Timoner
- Oren Jacoby
- Oren Moverman
- Oren Peli
- Oren Rudavsky
- Orson Cummings
- Orson Welles
- Osamu Yamazaki
- oslash;ren Kragh-Jacobsen
- Otakar Vavra
- Othmar Schmiderer
- Otto Buj
- Otto Preminger
- Ousmane Sembene
- Owen Wilson
- Oxide Pang
- Oxide Pang Chun