• Anna Kendrick as Queen Poppy, the sweet and optimistic queen of the Pop Trolls
• Justin Timberlake as Branch, an over-cautious but good-hearted survivalist Pop Troll and Poppy's best friend
• Rachel Bloom as Queen Barb, the queen of the Hard Rock Trolls
• James Corden as Biggie, a large, friendly British Pop Troll and the owner of Mr. Dinkles
• Ron Funches as Cooper, a giraffe-like Pop Troll who discovers he is a long-lost prince of the Funk Trolls
• Kelly Clarkson as Delta Dawn, the mayor of the centaur-like Country Trolls
• Anderson .Paak as Darnell, one of the princes of the Funk Trolls and Cooper's twin brother
• Sam Rockwell as Hickory, one of the Yodelling Trolls who disguises himself as a Country Troll
• George Clinton as King Quincy, the king of the Funk Trolls and Cooper and Prince D’s father
• Mary J. Blige as Queen Essence, the queen of the Funk Trolls and Cooper and Prince D’s mother
• Kenan Thompson as Tiny Diamond, a baby glittery Hip-Hop Troll and Guy Diamond's newborn son
• Kunal Nayyar as Guy Diamond, a glittery Pop Troll with a highly auto-tuned voice and Tiny Diamond's single father
• Icona Pop as Satin and Chenille, twin Pop Trolls with a flair for fashion design are conjoined by their hair
• J Balvin as Tresillo, the leader of the Reggaeton Trolls
• Flula Borg as Dickory, one of the Yodelling Trolls and Hickory's brother who helped with his Country Troll disguise
• Ester Dean as Legsly, a Pop Troll who can make her legs grow long at will
• Jamie Dornan as Chaz, the Smooth Jazz Troll
• Gustavo Dudamel as Trollzart, the ruler and conductor of the butterfly-winged Classical Trolls
• Ozzy Osbourne as Thrash, the retired king of the Hard Rock Trolls and Barb's semi-senile father who moves around in a wheelchair
• Anthony Ramos as King Trollex, the king of the half-fish Techno Trolls
• Karan Soni as Riff, a Hard Rock Troll and Barb's laid-back drummer
• Charlyne Yi as Pennywhistle, a small flute who resides with the Classical Trolls
• Red Velvet as the K-Pop Gang, a group of K-pop Trolls:
• Kevin Michael Richardson as:

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On February 28, 2017, Universal Pictures and DreamWorks Animation announced a sequel to the 2016 film Trolls, with Anna Kendrick and Justin Timberlake reprising their roles as Poppy and Branch.

In March 2017, podcasters the McElroy brothers began campaigning for roles in the film via a podcast titled "The McElroy Brothers Will Be in Trolls 2". Following the campaign's success, DreamWorks confirmed in September 2018 that the McElroy brothers would make cameo appearances in World Tour.

Sam Rockwell, Chance the Rapper, Anthony Ramos, Jamie Dornan and Flula Borg were added to the cast in May 2018. Corden, Icona Pop, Funches, and Nayyar returned to reprise their roles. On June 12, 2018, the film was retitled as Trolls World Tour. In October 2018, it was confirmed that Kelly Clarkson had joined the cast, and will perform an original song. In June 2019, along with promotional posters, new cast members have been announced, which include: J Balvin, Mary J. Blige, Rachel Bloom, George Clinton, Ester Dean and Gustavo Dudamel.

The marking custom animation to promote the film was provided from Minimo VFX & Jellyfish Pictures, who would do the animation for Spirit Untamed and have produced assets for The Boss Baby: Family Business and The Bad Guys.
Along with Timberlake, Clarkson, .Paak, Blige and Clinton, songs are provided by Chris Stapleton and SZA.

The first single from the movie's soundtrack, "The Other Side", by Timberlake and SZA, was released on February 26, 2020. The Trolls World Tour: Original Motion Picture Soundtrack was released on March 13, 2020.

The score is composed by Theodore Shapiro, in his second DreamWorks Animation film, following Captain Underpants: The First Epic Movie.

Universal Pictures had originally planned to release Trolls World Tour theatrically in the United States on April 10, 2020. It was later pushed up to February 14, 2020, before being pushed back to April 17, 2020. Following the delay of No Time to Die, it was once again pushed up to the original April 10 release date. It was also set to be released on March 20 in the United Kingdom, but due to the COVID-19 pandemic in the United Kingdom, its release date was pushed back to April 6.

On March 17, Universal announced that the film would be released simultaneously in theaters and for digital rental on April 10 in the United States and Canada due to the COVID-19 pandemic. By then, Trolls World Tour had only been released in Russia, Singapore, and Malaysia. Other films distributed by the studio, such as The Invisible Man and The Hunt were also released digitally before the end of the usual 90-day theatrical run. The film was the first from Universal to receive a simultaneous theatrical and pay television release since 1983's The Pirates of Penzance.

As the lockdown measures receded, the film was released in three Santikos Theatres locations in San Antonio, Texas on May 1, 2020. Theatres in Hong Kong also started to show the film a week later on May 8, 2020. In Russia the film was made available in IMAX cinemas. In Austria and the Netherlands, it was released in both 4DX and Dolby Cinema.
Trolls World Tour was made available for an early digital purchase on June 23, 2020. The film was released on DVD, Blu-ray, and Ultra HD Blu-ray by Universal Pictures Home Entertainment on July 7, 2020. All releases include an original short film entitled "Tiny Diamond Goes Back to School". By July 19, the film had totaled $23.6 million worth of DVD and Blu-ray sales. The movie was also available to stream on the streaming service Peacock.
In response to Universal releasing the film without consulting theater owners, as well as comments from NBCUniversal CEO Jeff Shell suggesting that future Universal releases would premiere on streaming simultaneously in theaters, AMC Theatres stated that they would not license films that also premiere at the same time on digital release; "Going forward, AMC will not license any Universal movies in any of our 1,000 theatres globally on these terms." Regal Cinemas followed suit in a statement not just directed at Universal, saying "we will not be showing movies that fail to respect the windows". However, in July 2020, AMC and Universal announced they had come to a deal to shorten the minimum theatrical window to 17 days (down from the usual 90), and that AMC would receive an undisclosed share of subsequent PVOD sales, resulting in a termination of AMC's ban on Universal's films.

The Hollywood Reporter wrote that some of the cast, including Anna Kendrick and Justin Timberlake, were not aware of the film's VOD release, and that their representatives were trying to secure the actors' bonuses they would have received had the film performed well theatrically.
A video game set after Trolls World Tour, titled Trolls: Remix Rescue, was released on October 27, 2023, by DreamWorks Animation and Game Mill Entertainment for PlayStation 4, PlayStation 5, Xbox One, Xbox Series X and Series S, Nintendo Switch, and PC. In this game, Poppy, Branch, and the player character must embark on a quest to save the Troll Kingdom from Chaz the S…

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