The Transformers: The Return of Unicron

 is a 2018 Canadian-American direct-to-video animated action movie based off the Transformers franchise. Based on the original 1980s incarnation of the franchise, it features the surviving voice actors from the incarnation's animated series reprising their roles with reprising his role of Hot Rod/Rodimus Prime from The Transformers: The Movie, assisted by soundalikes of the deceased/retired voice actors.

Autobots

 * as Optimus Prime and Ironhide
 * as Bumblebee
 * as Cliffjumper and Ratchet
 * as Wheeljack and Kup
 * as Prowl, Sideswipe, and Swoop
 * as Windblade
 * as Arcee
 * as Jazz and Red Alert
 * as Powerglide
 * as Hot Rod/Rodimus Prime
 * as Wheelie, Sludge, and Mirage
 * as Hound
 * as Springer and Slag
 * as Brawn
 * as Nancy
 * as Wreck-Gar
 * as Ultra Magnus and Bluestreak
 * as Snarl
 * as Jetfire and Grimlock
 * as Blaster
 * Javier Pontón as Radio AM Robot
 * as Beachcomber and Seaspray
 * as Devcon
 * as Blurr and Punch

Deceptions

 * as Megatron, Soundwave, Skywarp, Rumble, Frenzy, Ravage, and Mixmaster
 * as Starscream
 * as Reflector
 * as Thundercracker and Scavenger
 * as Astrotrain
 * as Shockwave
 * as Scrapper and Bombshell
 * as Hook and Bonecrusher
 * as Shrapnel
 * as Long Haul
 * as Counterpunch
 * as Blitzwing
 * as Kickback
 * as Devastator and Scorponok

Others

 * as Unicron
 * as Spike Witwicky
 * as Carly Witwicky
 * as Daniel Witwicky
 * as Sparkplug Witwicky (flashback sequence only)