Flint Lockwood (voice)
Sam Sparks (voice)
Tim Lockwood (voice)
Chester V (voice)
Brent McHale (voice)
Manny (voice)
Steve (voice)
Earl Devereaux (voice)
Barb (voice)
Barry / Dill Pickle (voice)
Sentinel Louise / Live Corp Scientist (voice)
Sentinel Peter / Labcoat Jenny (voice)
Fintly McCallahan / Idea Pants Guy (voice)
Cal Devereaux (voice)
Young Flint (voice)
Patrick Patrickson (voice)
Additional Voices (voice)