Star Wars’ first live-action television series, The Mandalorian, has enjoyed huge commercial and critical success ever since it came out in 2019. For instance, Lucasfilm released a trailer for the third season in January and it garnered 83.5 million views within 24 hours to become the most-viewed Star Wars series trailer ever.

Now, only a few days before the show’s third season’s debut on Disney+, the series’ showrunner Jon Favreau has confirmed that he has completed the script for the fourth season.
Favreau revealed this in an interview with the French entertainment news program BFMTV Inside as he promoted Season 3, saying:
Season 4? Yeah, I've written it already. We have to know where we're going to tell a fully-formed story, so we had mapped it out, Dave [Filoni] and I, and then slowly you just write each episode. So I was writing it during post-production [on The Mandalorian Season 3] because all of it has to feel like a continuation and one full story.
Favreau originally revealed he was working on the script for The Mandalorian season four last May during an interview with Cinema Blend. At the time, Favreau claimed that Season 4 will be different from earlier seasons. According to the occasional actor, the first season of The Mandalorian allowed him to weave the story in any direction he desired. However, the fourth season requires him to answer more questions and be more careful, ensuring that the stories connect and overlap properly with previous seasons and the spinoffs.
Set about five years after the events of Return of the Jedi, The Mandalorian follows the titular character, a lone Mandalorian bounty hunter, as he seeks to protect a Force-sensitive infant, Grogu, from the clutches of the imperial forces. Season 3 will see the character continue on his adventures through the galaxy with the child in tow.
Pedro Pascal portrays Djarin/The Mandalorian in the show, which also features Carl Weathers, Werner Herzog, Omid Abtahi, Gina Carano, Giancarlo Esposito, Emily Swallow, Sedaris, Ming-Na Wen, Rosario Dawson, and Katee Sackhoff. Favreau serves as executive producer alongside Filoni, Kathleen Kennedy, Colin Wilson, and Rick Famuyiwa. He also wrote the show with Famuyiwa, Filoni, Christopher Yost, and Noah Kloor.
By the way, Lucasfilm president Kathleen Kennedy revealed the studio’s plans for every show in the MandoVerse to connect and conclude in a "climactic story event" that is similar to Avengers: Endgame. However, none of Kennedy, Favreau, or Filoni have provided detailed information on how they intend to accomplish this.
In the meantime, The Mandalorian season three will premiere on Disney Plus on March 1 while Pascal stars as Joel Miller in HBO's The Last of Us, which will welcome Episode 7 on Sunday, February 26.