Actor, Director, Composer, and Scriptwriter List: - O -
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- O'Brian, Patrick (Master and Commander: The Far Side of the World)
- O'Connell, Arthur (The Poseidon Adventure)
- O'Connell, Jerry [2 titles]
- O'Connor, Carrol (Return to Me)
- O'Connor, Derek [2 titles]
- O'Connor, Frances (Artificial Intelligence: A.I.)
- O'Connor, Kevin J. (There Will Be Blood)
- O'Dea, Judith (Night of the Living Dead)
- O'Hara, Catherine [4 titles]
- O'Hara, David [2 titles]
- O'Malley, Mike [2 titles]
- O'Neal, Patrick (Under Siege)
- O'Rourke, Tom (United 93)
- Oedekerk, Steve (Barnyard)
- Ogorodnikova, Tamara (Zerkalo (Зеркало))
- Oh, Sandra (The Night Listener)
- Okada, Kouki (Metoroporisu)
- Okura, Masaaky (Akira)
- Oldman, Gary [2 titles]
- Olmos, Edward James (Kaze no tani no Naushika)
- Olsen, Aren (Mighty Morphin Power Rangers: The Movie)
- Olson, Josh (A History of Violence)
- Olyphant, Timothy (The Girl Next Door)
- Ootani, Ikue (Pokémon the First Movie: Mewtwo Strikes Back)
- Orman, Roscoe (The Adventures of Elmo in Grouchland)
- Orme, Stuart (The Puppet Masters)
- Orr, Jordan (Kaze no tani no Naushika)
- Ortega, Kenny (High School Musical)
- Ortiz, John (American Gangster)
- Osborne, Holmes [2 titles]
- Osborne, Mark (Kung Fu Panda)
- Osment, Eugene (Artificial Intelligence: A.I.)
- Osment, Haley Joel [2 titles]
- Ossana, Diana (Brokeback Mountain)
- Otake, Hiroshi (Akira)
- Otomo, Katsuhiro [3 titles]
- Ottman, John [3 titles]
- Otto, Miranda (War of the Worlds)
- Oumansky, André (Marie Antoinette)
- Outerbridge, Peter (Mission to Mars)
- Oz, Frank [3 titles]
