 Kathy NajimyKathy Lane | Kathy Lane |
 Matt FrewerThe Cat in the Hat | The Cat in the Hat |
 Christopher LloydMr. Hunch | Mr. Hunch |
 Patrick StewartSergeant Mulvaney | Sergeant Mulvaney |
 Billy CrystalThe Voice of America (voice) | The Voice of America (voice) |
 Robin WilliamsThe Father | The Father |
 Howie MandelSam-I-Am (voice) | Sam-I-Am (voice) |
 Andrea MartinThe Ad Woman | The Ad Woman |
 David PaymerThe Ad Man | The Ad Man |
| JJ.D. DanielsMarco (segment "Mulberry Street") | Marco (segment "Mulberry Street") |
 Eileen BrennanThe Who-Villain | The Who-Villain |
 Graham JarvisThe Farmer | The Farmer |
 Brady BluhmMarco (segment "McElligot's Pool") | Marco (segment "McElligot's Pool") |
| AAndraé CrouchYertle | Yertle |
| BBright EyesMack | Mack |
| MMaxi AndersonTurtle Choir Member | Turtle Choir Member |
| TTroy BurgessTurtle Choir Member | Turtle Choir Member |
| RReggie BurrellTurtle Choir Member | Turtle Choir Member |
| RRick CharlesTurtle Choir Member | Turtle Choir Member |
| SSandra CrouchTurtle Choir Member | Turtle Choir Member |
| KKristle MurdenTurtle Choir Member (as Kristle Edwards) | Turtle Choir Member (as Kristle Edwards) |
| VVoncielle FaggettTurtle Choir Member | Turtle Choir Member |
| DDavid GibsonTurtle Choir Member / Green Eggs and Ham Player | Turtle Choir Member / Green Eggs and Ham Player |
| TTammie GibsonTurtle Choir Member | Turtle Choir Member |
| KKathy HazzardTurtle Choir Member | Turtle Choir Member |
| LLinda McCraryTurtle Choir Member | Turtle Choir Member |
| GGene MontoyaTurtle Choir Member / Green Eggs and Ham Player | Turtle Choir Member / Green Eggs and Ham Player |
| KKim O'KelleyTurtle Choir Member | Turtle Choir Member |
| AAlfie SilasTurtle Choir Member | Turtle Choir Member |
 Kevin Alexander SteaTurtle Choir Member | Turtle Choir Member |
