Portal:Animation/Anniversaries/December/December 21
- Films released
- 1929 – Wild Waves (United States)
- 1934 – Goofy Gondolas (United States)
- 1937 – Walt Disney's Snow White and the Seven Dwarfs, the first feature-length animated cartoon with sound, opens in Los Angeles. By the end of its original run, it will earn over $8 million in international box office receipts.
- 1940 – The Timid Toreador (United States)
- 1940 – Shop, Look and Listen (United States)
- 1945 – Old Sequoia (United States)
- 1995 – Sailor Moon SuperS: The Movie (Toei Animation, Japan)
- 2001 – Jimmy Neutron: Boy Genius (Nickelodeon Movies, Paramount Pictures, United States)
- 2002 – Inuyasha the Movie: The Castle Beyond the Looking Glass (Sunrise, Viz Media, Tōhō, Japan)
- 2007 – How to Hook Up Your Home Theater (United States)
- 2022 – Puss in Boots: The Last Wish (Dreamworks Animation, Universal Pictures, United States)
- Television series and specials
- Births