- Owen Wilson (21 movies)
- Olivia Wilde (17 movies)
- Oliver Platt (12 movies)
- Orlando Bloom (12 movies)
- Oscar Isaac (11 movies)
- Octavia Spencer (10 movies)
- Olga Kurylenko (10 movies)
- Olivia Williams (8 movies)
- Olivia Munn (7 movies)
- Olivia Thirlby (6 movies)
- Oded Fehr (5 movies)
- Oliver Phelps (5 movies)
- Olivia Colman (5 movies)
- Omar Sy (5 movies)
- Olafur Darri Olafsson (4 movies)
- Oleg Taktarov (4 movies)
- Olivia Jordan (4 movies)
- Omid Djalili (4 movies)
- Odette Annable (3 movies)
- Oliver Ford Davies (3 movies)
- Oliver Jackson-Cohen (3 movies)
- Oliver Muirhead (3 movies)
- Omar J. Dorsey (3 movies)
- Omid Abtahi (3 movies)
- Oprah Winfrey (3 movies)
- Óscar Jaenada (3 movies)
- Odeya Rush (2 movies)
- Ofield Williams (2 movies)
- Olek Krupa (2 movies)
- Olga Merediz (2 movies)
- Oliver Ackland (2 movies)
- Oliver Cooper (2 movies)
- Oliver Maltman (2 movies)
- Oliver Stark (2 movies)
- Olivia d'Abo (2 movies)
- Olivia Luccardi (2 movies)
- Olivia Taylor Dudley (2 movies)
- Olivier Rabourdin (2 movies)
- Olwen Fouéré (2 movies)
- Om Puri (2 movies)
- Omar Benson Miller (2 movies)
- Omar Doom (2 movies)
- Omar Metwally (2 movies)
- Omari Hardwick (2 movies)
- Ona Grauer (2 movies)
- Oona Chaplin (2 movies)
- Ophelia Lovibond (2 movies)
- Orlando Jones (2 movies)
- Oscar Nunez (2 movies)
- Osmani Rodriguez (2 movies)