Exclusive: Comedian Katt Williams is boarding Adam Rifkin’s trippy road-trip comedy Toad opposite James Paxton (Twisters) and Oliver Wyman (Feeling Randy).

The pic follows two dudes who are hired by terrifying crime boss, Charles (Craig Robinson), to transport a box of contraband psychedelic toads from L.A. to Vegas. When the soaring desert temperatures cause the toads to suffer heatstroke, the two imbeciles are inadvertently dosed when they give the toads CPR and suddenly find themselves on a hallucinogenic odyssey.

Williams will play Earl, a cigar-chomping, human-size anthropomorphic toad who may or may not be a figment of the boys’ imaginations. Earl pops up at key points along their journey to give them unsolicited but much-needed advice and philosophical wisdom.

Says Rifkin:”Katt Williams is not only the funniest man on the planet, he’s a latter-day prophet with a voice that resonates across generations. His ability to channel raw truth,...