- Olwen Fouéré (3 films)
- Octavia Spencer (2 films)
- Odette Annable (2 films)
- Olivia DeJonge (2 films)
- Olivia Taylor Dudley (2 films)
- Olivia Wilde (2 films)
- Orlando Jones (2 films)
- Ottaviano Dell'Acqua (2 films)
- Owain Yeoman (2 films)
- Owen Teague (2 films)
- O-Lan Jones (1 film)
- Oaklee Pendergast (1 film)
- Oakley Lehman (1 film)
- Oana Pellea (1 film)
- Obba Babatunde (1 film)
- Obssa Ahmed (1 film)
- Octavian Cadia (1 film)
- Oded Fehr (1 film)
- Odessa Rae (1 film)
- Ofilio Portillo (1 film)
- Oh Hye-won (1 film)
- Oh San-ha (1 film)
- Oka Antara (1 film)
- Oksana Akinshina (1 film)
- Olav Pedersen (1 film)
- Ole Martin Aune Nilsen (1 film)
- Oleg Taktarov (1 film)
- Olga Kurylenko (1 film)
- Olga Svecova (1 film)
- Olga Wehrly (1 film)
- Oliver Dear (1 film)
- Oliver Grober (1 film)
- Oliver Gustav (1 film)
- Oliver Jackson-Cohen (1 film)
- Oliver Koomsatira (1 film)
- Oliver Milburn (1 film)
- Oliver Platt (1 film)
- Oliver Rice (1 film)
- Oliver Robins (1 film)
- Oliver Steer (1 film)
- Oliver Stokowski (1 film)
- Olivia Colman (1 film)
- Olivia Cooke (1 film)
- Olivia Gillies (1 film)
- Olivia Harewood (1 film)
- Olivia Hussey (1 film)
- Olivia Luccardi (1 film)
- Olivia Marcum (1 film)
- Olivia Munn (1 film)
- Olivia Rainey (1 film)