- O'Shea Jackson Jr. (1 film)
- Oakes Fegley (1 film)
- Obba Babatunde (1 film)
- Oded Fehr (1 film)
- Odette Annable (1 film)
- Odeya Rush (1 film)
- Oh Dal-Su (1 film)
- Oka Antara (1 film)
- Oksana Akinshina (1 film)
- Oksana Fandera (1 film)
- Olfa Hamrouni (1 film)
- Olga Baclanova (1 film)
- Olga Karlatos (1 film)
- Olga von Luckwald (1 film)
- Oliver Masucci (1 film)
- Oliver Reed (1 film)
- Oliver Stokowski (1 film)
- Olivia Alexander (1 film)
- Olivia Bonamy (1 film)
- Olivia Luccardi (1 film)
- Olivia Ruiz (1 film)
- Olivia Taylor Dudley (1 film)
- Olivia Thirlby (1 film)
- Olivia Williams (1 film)
- Olivier Bureau (1 film)
- Olivier Richters (1 film)
- Olivier Saladin (1 film)
- Olwen Fouéré (1 film)
- Omar Abdi (1 film)
- Omari Hardwick (1 film)
- Omid Djalili (1 film)
- Onni Tommila (1 film)
- Ophélie Winter (1 film)
- Orlando Jones (1 film)
- Ornella Fleury (1 film)
- Orson Welles (1 film)
- Oscar Avila (1 film)
- Óscar Jaenada (1 film)
- Oscar Martínez (1 film)
- Oskar Keymer (1 film)
- Ossie Davis (1 film)
- Otto Jespersen (1 film)
- Otto Kruger (1 film)
- Ovanes Torosian (1 film)
- Owen Myre (1 film)
- Oliver Cooper (2 films)
- Oliver Platt (2 films)
- Olivier Baroux (2 films)
- Olivier Gourmet (2 films)
- Oona Laurence (2 films)
