- Oblivion Island: Haruka and the Magic Mirror ( 2009 ) Adventure, Animation
- Ocean Waves ( 1993 ) Animation, Drama, Romance
- Oh Willy... ( 2013 ) Adventure, Animation, Drama
- Oktapodi ( 2007 ) Animation
- Oliver & Company ( 1988 ) Animation, Comedy, Family
- On the Trail of the Bremen Town Musicians ( 1973 ) Adventure, Animation, Family
- On Your Mark ( 1995 ) Animation, Music, Science Fiction
- Once Upon a Forest ( 1993 ) Adventure, Animation, Family
- Once Upon a Line ( 2016 ) Animation
- One Froggy Evening ( 1955 ) Animation, Comedy, Family
- One Hundred and One Dalmatians ( 1961 ) Adventure, Animation, Comedy, Family
- One Man Band ( 2005 ) Animation, Family
- One Night in A City ( 2007 ) Animation, Fantasy, Horror
- One Piece Film: GOLD ( 2016 ) Action, Adventure, Animation, Comedy
- One Piece Film Strong World ( 2009 ) Adventure, Animation, Fantasy
- One Piece Film Z ( 2012 ) Action, Adventure, Animation
- One Step Ahead of My Shadow ( 1933 ) Animation, Comedy
- One Thousand and One Nights ( 1969 ) Animation, Drama, Fantasy
- Only Yesterday ( 1991 ) Animation, Drama, Romance
- Ooops! Noah is Gone... ( 2015 ) Adventure, Animation, Comedy
- Open Season 2 ( 2008 ) Adventure, Animation, Comedy, Family
- Open Season ( 2006 ) Adventure, Animation, Family
- Open Season 3 ( 2010 ) Animation, Comedy, Family
- Open Season: Scared Silly ( 2015 ) Adventure, Animation, Comedy, Family
- Operation: Rabbit ( 1952 ) Animation
- Opus II ( 1921 ) Animation
- Opus IV ( 1925 ) Animation
- Origin: Spirits of the Past ( 2006 ) Action, Adventure, Animation, Drama, Fantasy, Romance, Science Fiction
- Osmosis Jones ( 2001 ) Action, Adventure, Animation, Comedy, Family
- Other Worlds ( 1999 ) Animation, Drama, Romance
- Outlanders ( 1986 ) Animation, Comedy, Science Fiction
- Outrageous! ( 1977 ) Animation, Comedy
- Over the Garden Wall ( 2014 ) Adventure, Animation, Family, Fantasy
- Over the Hedge ( 2006 ) Animation, Comedy, Family
- Ozzy ( 2016 ) Animation, Family
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