Production timeline

This timeline holds a list of events pertaining to Miraculous: Tales of Ladybug & Cat Noir, both in the real world and within the series itself. For now, it is a list of documented news and events that follows Miraculous's development with updated news. Italicized information is information that is still considered true, while striked information is information that is out of date or debunked, therefore no longer being true.

April

 * April 04: Ladybug is first mentioned as a 3D feature film with a TV show in progress. Comics and other variations may also come!

June

 * June 06: Zagtoon enrolls Japan's Toei Animation to co-produce "Miraculous".

June

 * June 07: The series is announced to be 26 episodes.

August

 * August 26: Ladybug PV is uploaded on YouTube as private titled "Lady Bug Japanese version".

September

 * September 04: Ladybug PV is accidentally made public after being privately uploaded on August 26.
 * Ladybug is now referred to as Lady Bug or Miraculous Ladybug.
 * Method Animation is revealed to be responsible for the series' CGI elements.
 * Ladybug has a 3D full-length movie in the works while Toei is involved in only the 2D TV series project.
 * September 12: A fan receives an e-mail back from Jeremy Zag claiming that an official LADYBUG website will be uploaded.

May

 * May 20: Ladybug is set to air on Brazil's Gloob, Canada's Telet-Quebec, and Australia's ABC. Disney Channel has also picked up exclusive pay-TV rights in Europe, Eastern Europe, Scandinavi, Spain, Germany, Russia, and Turkey.
 * SAMG Animation and SK Broadband in Korea now join as international partners.
 * The series is announced to be launched during the second quarter of 2015.

February

 * February 09: Work-in-progress clip is uploaded on Jeremy Zag's Instagram.
 * February 10: An extended version of the work-in-progress clip is uploaded on Zagtoon's Vimeo.
 * February 12: Marinette's best friend's name is revealed to be Alya.
 * February 13: Jeremy Zag uploaded a video on Instagram with the description "Stormy Weather" showcasing the mysterious villainess who controls the winds.

March

 * March 11: The French cast is revealed though not named, revealing a name for another unknown character, Aurore.
 * March 20: English dubbed version cast is revealed, along with a character name, Plagg.

June

 * June 08: More news about Ladybug 's licensing partners is announced. Also, the series is still confirmed to premiere worldwide in Fall 2015.
 * June 11: Jeremy Zag revealed that at the Licensing Expo in Las Vegas, 300 licensees from across the globe joined with Ladybug. Afterwards, Zag announced that 540 licensees from around 120 countries are involved.
 * June 15: An official trailer for the show is discovered, including a lot of new footage and an official series song.
 * June 24: Jeremy Zag confirms that Ladybug is still planned to air in Fall 2015 and reveals the networks around the world that the show will air on, including Nickelodeon for the USA.

July

 * July 02: Another video with the theme song, including old footage from the previous trailer and new footage, is released.
 * July 04: News on the show comes out, including that there will be an app with webisodes, printable activities, and blog posts from Marinette about her daily life and secret life. Also, another character is briefly mentioned, Marinette's rival Chloe.
 * July 06-12: At the Nickelodeon area at San Diego Comic Con 2015, as seen on Zagtoon's Facebook page, posters for the show and an official cosplayer of Ladybug were there. Also, the show in the US is now fully confirmed to be called Miraculous: Tales of Ladybug & Cat Noir, and Jeremy Zag commented on his Instagram that there will be an official announcement for the series in a few days.
 * July 22: In Korea, there was a press conference for the series held by SAMG Animation. YouTube user Acrofan recorded clips from the conference, including some with new clips of the show and the Korean version of the theme song, performed by Fiestar.
 * Also, according to the press, Miraculous will premiere on EBS in Korea on September 1, while the show will premiere on TF1 in France and Nickelodeon in the US in October.

August

 * August 26: For the premiere of Miraculous in Korea, two previews (the latter preview recorded by Tumblr user onyany-stuffz but without sound) were released.

September

 * September 01: Miraculous premiered in Korea, including the Korean version of the opening.
 * September 09: Comicbook.com announced that in the US, Miraculous will premiere on December 6 on Nickelodeon.
 * September 21: On Wat TV, a French trailer and the French version of the opening were released.
 * September 23: An document from TF1 for Miraculous was released. It includes character names and descriptions, interviews with production members, and more news on 10 webisodes coming out. An English translation of the document was made by Tumblr user misctreil and can been viewed here.
 * September 29: Thomas Astruc revealed that Miraculous will premiere in TF1 in France on October 19.
 * Also, on TFou.fr, the web series has been added. The episode that is voted for the most will be the first episode released.

October

 * October 19: Miraculous premiered in France.

December

 * December 6: Miraculous premiered in the US and Poland.