- Seth Rogen Character (B.O.B. (voice))
- Reese Witherspoon Character (Susan Murphy / Ginormica (voice))
- Hugh Laurie Character (Dr. Cockroach Ph.D. (voice))
- Paul Rudd Character (Derek Dietl (voice))
- Kiefer Sutherland Character (General W.R. Monger (voice))
- Rainn Wilson Character (Gallaxhar (voice))
- Will Arnett Character (The Missing Link (voice))
- Stephen Colbert Character (President Hathaway (voice))
- Jimmy Kimmel Character (Insectosaurus (voice))
- Julie White Character (Wendy Murphy (voice))
- Jeffrey Tambor Character (Carl Murphy (voice))
- Amy Poehler Character (Computer (voice))
- Ed Helms Character (News Reporter (voice))
- Rene Zellweger Character (Katie (voice))
- Sean Bishop Character (Private Bullhorn / Helicopter Pilot / Advisor Ortega (voice))
- Rich Dietl Character (Commander / Advisor Smith (voice))
- Stephen Kearin Character (Technician Bee (voice))
- Rob Letterman Character (Secret Service Man #1 / Lieutenant (voice))
- Tom McGrath Character (Wilson (voice))
- Chris Miller Character (Advisor Cole / Army Commander Jones (voice))
- Mike Mitchell Character (Advisor Wedgie (voice))
- Kent Osborne Character (Technician Jerry (voice))
- Latifa Ouaou Character (Advisor Ouaou / Mrs. Ronson / Female Advisor #2 / Panicked Guest (voice))
- Geoffrey Pomeroy Character (Soldier #4 / Pilot / Soldier #3 / News Technician (voice))
- David P. Smith Character (Soldier #1 / Advisor Jackson (voice))
- Lisa Stewart Character (Bridesmaid Candy (voice))
- Conrad Vernon Character (Advisor Hawk / Advisor Dither / Minister / Secret Service Man #2 / Mama Dietl (voice))
- John Krasinski Character (Cuthbert (voice))
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