Duo Halloween Costume: Lloyd and Harry From "Dumb and Dumber" On the hunt for a famous duo costume inspired by a hilarious movie? Show up to your Halloween party as Lloyd and Harry from "Dumb and Dumber". What to wear for Lloyd: An orange suit with a matching hat and ruffled dress shirt. Don't forget your cane. What to wear for Harry: The same as above, only in powder blue. Image Source: Everett Collection