- Joshua Seth as Tai (returning)
- Colleen O'Shaughnessey as Sora (returning)
- Cherami Leigh as Biyomon
- Melodee M. Spevack as Birdramon (returning)
- Tom Fahn as Agumon (returning)
- Kyle Hebert as Greymon
- Mona Marshall as Izzy (returning)
- Jeff Nimoy as Tentomon, Kabuterimon (returning)
- Cristina Vee as Meiko Mochizuki
- Kate Higgins as Meicoomon
- Robbie Daymond as Joe
- R. Martin Klein as Gomamon (returning)
- Philece Sampler as Mimi (returning)
- Anna Garduno as Palmon (returning)
- Mari Devon as Togemon (returning)
- Doug Erholtz as Nishijima
- Johnny Yong Bosch as T.K.
- Laura Summer as Patamon (returning)
- Dave Mallow as Angemon (returning)
- Tara Sands as Kari
- Kate Higgins as Gatomon, Himekawa
- Vic Mignogna as Matt
- Kirk Thornton as Gabumon, Garurumon (returning)
Eleven Arts and Toei Animation will release the English language version of Digimon Adventure tri. – Chapter 1: Reunion in theaters in the United States as a one-night Fathom Events screening in more than 400 theaters on Thursday. It will be followed by a national theatrical release in major cities.The Digimon Adventure tri. project, which celebrates the 15th anniversary of Digimon Adventure (the first entry in the series), will have a total of six films. While the anime's human characters have a completely different Japanese voice cast from the original Digimon Adventure, the Digimon partners feature the same Japanese cast.
The first film, Digimon Adventure tri. Saikai (Reunion), opened in Japanese theaters last November, and Crunchyroll began streaming the film on the same day as four episodes. The second film, Digimon Adventure tri. Ketsui (Determination), opened in Japan on March 12 for a three-week run in theaters in Japan. Crunchyroll began streaming the film as four episodes on March 11.
The third film, Digimon Adventure tri. Kokuhaku, will open in Japan for three weeks on September 24, and will be available for paid streaming in Japan on the same day. The Blu-ray Disc of the film will be on sale at theaters on the same day, and the general release on Blu-ray Disc and DVD will be on November 2.