Season 3

The third season of Miraculous: Tales of Ladybug & Cat Noir was confirmed to be in progress by Jeremy Zag. It will have 26 episodes. According to Thomas Astruc, episodes in this season will be self-contained, but there will be powerful ongoing story arcs.

The world premiere of Season 3 was in Spain on December 1, 2018, (10:40 UTC+1) with the airing of "Chameleon" on Disney Channel.

The season is expected to premiere on April 14, 2019 for France.

Season overview
''With time, Marinette and Adrien ended up becoming friends. But the collège girl discovers that declaring her feelings for her friend is not so simple, in fact, it will be almost the opposite!''  

''For Ladybug and Cat Noir, despite their new powers and teammates that they can call upon when the situation requires it, the fight with Hawk Moth becomes harder and harder. Their opponent is always stronger as long as he can call on Mayura, a villain who can create allies for the Akumatized, the supervillains.''

''More powers, more action, more villains, and more emotions! Season 3 will put Adrien and Marinette to the test: Will they be able to keep their secret and prevent their private life from interfering with their superhero adventures?''

2016
On July 3, 2016, Thomas Astruc explained that Season 3 was being written at the same time as Season 2, in order to avoid a hiatus between seasons. As of January 14, 2017, the season was still in the writing process.

At a panel at New York Comic Con on October 7, the crew revealed a new sneak-peek image of the peacock superhero, with the image labelled as being for Season 3. They also showed concept art of Duusu, whose image noted her as appearing in both Season 2 and Season 3. In a teaser for a Los Angeles Comic-Con panel for October 30, Jeremy Zag revealed that a fan of the show would be akumatized in Season 3.

Astruc confirmed at Comic Con Paris on October 23 that the crew was currently writing Season 3, and because they set the bar very high for Season 2, the writers had a lot of pressure to improve from that with Season 3.

2017
On March 1, 2017, Astruc announced on Twitter that the crew had written three episodes in one day, saying that "on the menu" are a "big party, apocalypse, and DBMAT." The next day, he added a picture of what DBMAT stood for: "Dragon Ball Martial Arts Tournament" from the franchise Dragon Ball. Later that month, on March 22, director Wilfried Pain revealed that the production of the season was in its storyboarding and animatic phases.

When asked on April 10, 2017 if the show will include new heroes that are more diverse, the official Miraculous Ladybug Tumblr blog replied that it would, noting, "Wait until you see Season 3!" In response to a user asking about his day, Astruc posted that the crew had finished writing another episode that "will blow [their] mind" and only had six more episodes left to be written for Season 3.

On Twitter on May 1, 2017, Astruc posted that he was working on finishing a story before the next day, noting that in it, Marinette and Adrien will be together, with Astruc calling it "EXTREME Adrienetting." On May 17, during a live event for the series, Princess Fragrance was confirmed to return for the season, along with other akumatized villains, in a huge event.

At Dokomi 2017 on June 4, Astruc and Pain revealed that in a week, the crew would be creating the Season 3 finale.

In a press release video from TFOU on August 31, 2017, new information surfaced about a two-part special previously teased in May, "Heroes' Day," with "the best of the worst akumatized villains" returning and fighting the superheroes. Ultimately, however, Heroes' Day was released in Season 2 instead.

On December 28, 2017, in an interview, Pain noted that there is an episode in Season 3 that involves theater, and it will include a game that has references to anime.

2018
On March 20, 2018, Pain shared a rough animation of a Season 3 episode under the production code LB317. On May 6, 2018, a third-season poster was shown at the CONQUE event in Mexico. During the Japan Expo 2018 panel on July 9, 2018, Sébastien Thibaudeau revealed that the 78th episode had moved the team to tears. He hoped this would have the same effect on the spectators. On July 17, 2018, Morade Rahni, a storyboard designer, posted on Twitter an animatic of Rena Rouge detransforming, tagging the image with #Season3.

During the 2018 San Diego Comic-Con Miraculous Ladybug Panel, voice director for the English dub, Ezra Weisz, confirmed that the writing stage for Season 3 had been completed.

On November 2, 2018, Adrien's European Spanish voice actor, Jesús Barreda, announced that two episodes of Season 3 were to be dubbed the following week. Astruc noted on November 4 that the release range of Season 3 in France depends on the time of year, commenting, "Usually, in France, they like to launch new stuff for Easter or September. And it depends if there's a sufficient amount of episode[s]. So one sure thing only: no release date you could read can be accurate." Similarly to Barreda, the English voice actor for Tikki, Mela Lee, announced on an Instagram story on November 7 that English dubbing of Season 3 episodes was also to start the following week.

On November 21, 2018, the third season was confirmed to be in the recording process in Portugal. Three days later, Disney Channel Spain announced that they would premiere "Chameleon" on December 1, 2018. Similarly, Disney Channel Portugal announced that they would also be premiering the season that same day.

On December 6, 2018, Jeremy Zag revealed big spoilers of new transformations in the third season.

On December 8, 2018, CCXP 2018 released a clip from "Weredad" during a script reading by Brazilian Portuguese voice actors Fabricio Vilaverde (Cat Noir) and Jéssica Vieira (Ladybug).

On December 10, 2018, it was announced that Season 3 would premiere on Disney Channel UK at the start of the new year. The premiere actually occurred on March 4, 2019.

2019
On January 28, 2019, Family Channel Canada announced they would air the first 9 episodes of Season 3 during February. This was later cut back to 5 episodes, which is all they actually did air that month.

On February 1, 2019, RTS Deux revealed all of the episode titles and synopses for this season.

Episodes

 * Main articles: Episode guide and Episode guide/International

Note: This list follows the airing guide pertaining to Netflix's release. Also, as Netflix has precedence over the show, this Wiki will follow the episodes and numbering order based on Netflix's release. To see KidsClick's releases or the international release dates for episodes, look at the guide tabbers or Episode guide/International. Note: This guide lists the world premiere of each episode, followed by the order of their confirmation, which may not reflect the official order of the season according to Netflix. To see the U.S. release dates for episodes, look at the guide tabbers or Episode guide.
 * -|US releases (Netflix) =
 * -|International releases =

Trivia

 * Astruc's intention for Season 3 is to find out why Hawk Moth wants the Miraculouses.
 * According to Feri González in Season 3 there will be a lot of references to Season 2.
 * This appears to refer to the fact that many characters are going to be re-akumatized into villains, but with identities different from those of previous occasions.
 * Four akumatized villains from the first season are said to return: Stormy Weather, The Puppeteer, Reflekta, and Gamer.
 * Several previously akumatized characters are akumatized with new identities: Lila as Chameleon; Alya and Nino as Oblivio; Kagami as Onichan; Sabrina as Miraculer; Alya, Juleka and Rose as the Trio of Punishers; André and Audrey Bourgeois as Loveater and Chloé as Miracle Queen.
 * In one of the upcoming episodes of Season 3, there will be a reference to "Glaciator".
 * In "Oblivio" Ladybug mentions telling Cat Noir about the boy she likes.
 * The opening sequences of Season 3 are strictly the same as Season 2.

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