Assembled recalls the birth of X-Men: The Animated Series and its revival thirty years later.
| Name | Type | Role | |
|---|---|---|---|
| Meghan Leon | Writer | ||
| Larry Houston | Guest Star | Larry Houston - Consulting Producer | |
| Dana Vasquez-Eberhardt | Guest Star | Dana Vasquez-Eberhardt - Co-Executive Producer | |
| Alison Sealy-Smith | Guest Star | Alison Sealy-Smith - Storm | |
| Ryan Meinerding | Guest Star | Ryan Meinerding - Head of Visual Development and Character Design | |
| Matthew Waterson | Guest Star | Matthew Waterson - Magneto | |
| Lenore Zann | Guest Star | Lenore Zann - Rogue | |
| Jake Castorena | Guest Star | Jake Castorena - Supervising Producer & Director | |
| Adrian Hough | Guest Star | Adrian Hough - Nightcrawler | |
| Julia Lewald | Guest Star | Julia Lewald - Consulting Producer | |
| Jennifer Hale | Guest Star | Jennifer Hale - Jean Grey | |
| Cal Dodd | Guest Star | Cal Dodd - Wolverine | |
| Jeremy Polgar | Guest Star | Jeremy Polgar - Animation Supervisor | |
| Christopher Britton | Guest Star | Chris Britton - Mister Sinister | |
| Eric Lewald | Guest Star | Eric Lewald - Consulting Producer | |
| Ray Chase | Guest Star | Ray Chase - Cyclops | |
| George Buza | Guest Star | George Buza - Beast | |
| Chase Conley | Guest Star | Chase Conley - Director | |
| A.J. LoCascio | Guest Star | AJ LoCascio - Gambit | |
| Avi Arad | Guest Star | Avi Arad - Consulting Producer | |
| Chris Potter | Guest Star | Chris Potter - X-Men: TAS Gambit, X-Men '97 Cable | |
| Emi Yonemura | Guest Star | Emi-Emmett Yonemura - Director | |
| Ross Marquand | Guest Star | Ross Marquand - Professor X | |
| Bradford Baruh | Director |