Eric Christian Olsen and Derek Richardson will star as the teenage incarnations of one of the big screen’s dumbest duos in "When Harry Met Lloyd: Dumb & Dumberer", for New Line Cinema.The Hollywood Reporter says Olsen and Richardson will play adolescent versions of Harry and Lloyd, respectively, in the prequel to the 1994 blockbuster Dumb & Dumber, which starred Jeff Daniels and Jim Carrey. Rounding out the comedy’s cast will be Rachel Nichols, Eugene Levy, Mimi Rogers and Luis Guzman. "Dumberer" follows Harry and Lloyd — lovable best buddies who are big on heart but short on intellect — as they meet and try to survive high school. Nichols plays a classmate and love interest, Levy plays their high school principal, Rogers plays Harry’s mother, and Guzman has been cast as the school janitor who adopts Lloyd.