2021

This is a list of notable events, premieres, releases, series cancellations, and endings in the year 2021.

Television

 * March 4 - Kamp Koral: SpongeBob's Under Years premiered on Paramount+.
 * May 27 - The 2021 reboot of Rugrats premiered on Paramount+.
 * July 9 - The Patrick Star Show premiered.
 * October 1 - Premiere of The Ghost and Molly McGee.

Films

 * February 26 - Tom & Jerry (live-action Warner Bros.) was released.
 * March 4 - The SpongeBob Movie: Sponge on the Run (Nickelodeon) premiered in the United States on Paramount+.
 * March 5 - Raya and the Last Dragon (Disney) was released simultaneously in theaters and on Disney+.
 * June 18 - Luca (Disney/Pixar) was released on Disney+.
 * July 16 - Space Jam: A New Legacy (live-action Warner Bros.) was released theatrically.
 * August 6 - Vivo (Sony Pictures Animation) was released on Netflix.
 * August 20
 * PAW Patrol: The Movie (Nickelodeon) was released theatrically.
 * The Loud House Movie (Nickelodeon) was released on Netflix.
 * November 24 - Encanto (Disney) was released theatrically.
 * November 26 - A Loud House Christmas (live-action) was released on Nickelodeon.
 * December 3 - Diary of a Wimpy Kid (Disney) was released on Disney+
 * December 22 - Sing 2 (Illumination) was released theatrically.

Series finales

 * March 15 - DuckTales (2017), three seasons

Video games

 * April 29: SpongeBob SquarePants: Krusty Cook-off is released on Nintendo Switch
 * August 13: PAW Patrol: The Movie: Adventure City Calls is released on PlayStation 4, Nintendo Switch, Steam, Stadia, and Xbox One
 * October 5: Nickelodeon All-Star Brawl is released on Nintendo Switch, PlayStation 5, and Xbox One

Character debuts

 * March 5 - Raya, Sisu, Tuk Tuk, Boun, Tong, Noi, Ongis, Namaari, Chief Benja, Virana, Druun, Dang Hu, The Tail Chief, Dang Hai, The Spine Chief, Jagan
 * June 18 - Luca Paguro, Alberto Scorfano, Giulia Marcovaldo, Massimo Marcovaldo, Ercole Visconti, Daniela Paguro, Lorenzo Paguro, Ciccio and Guido, Uncle Ugo, Grandma Paguro, Caligola, Machiavelli, Concetta and Pinuccia Aragosta, Tabitha, Ms. Trunklebee
 * August 14 - Vee
 * August 20 - Liberty, Delores, Marty Muckraker, Kendra Wilson, Gus, Butch, Ruben, Angus, Morag, Lucille Loud, Lela
 * October 1 - Molly McGee, Scratch, Pete McGee, Sharon McGee, Darryl McGee, Grandma Nin, Libby Stein-Torres, Andrea Davenport, The Chairman, The Ghost Council
 * November 24 - Mirabel Madrigal, Agustín Madrigal, Julieta Madrigal, Luisa Madrigal, Isabela Madrigal, Pepa Madrigal, Félix Madrigal, Dolores Madrigal, Camilo Madrigal, Antonio Madrigal, Alma Madrigal, Bruno Madrigal, Pedro Madrigal, Pico, Osvaldo, Mariano Guzmán, Señora Guzmán, Chispi, Parce, Town Kids
 * December 3 - Greg Heffley, Rowley Jefferson

Deaths

 * July 1 - Philece Sampler, voice actress (b. 1953)
 * August 29 - Edward Asner, voice actor (b. 1929)