| Voice Actor | Character(s) |
|---|---|
 Ellen McLain |
GLaDOS / Turrets / Caroline |
 Mike Patton |
The Anger Core |
 Stephen Merchant |
Wheatley |
 J. K. Simmons |
Cave Johnson |
 Joe Micheals |
Announcer |
 Nolan North |
Corrupted Cores / Defective Turrets |
 Dee Bradley Baker |
Atlas / P-Body |