Costume designer Aggie Guerard Rodgers, who designed costumes for Return of the Jedi, American Graffiti and The Conversation, met Richter while working on Invasion of the Body Snatchers. Riva noted that "She fell right into step with the stuff I was designing for the sets," making the costumes match the color of the rooms. Richter wanted the Black Lectroids to have a "warrior-like demeanor, but in an elegant, not fierce fashion"; their costumes came from African tribal markings. For Buckaroo's and his Cavaliers' look, Rodgers gathered Gianni Versace, Perry Ellis, and Giorgio Armani sports jackets, suits, and ties. The clothing was mostly found in LA area stores. Rogers noted "We also wanted to have something a little off so that there's a kick to everything to make it unique. Rick changed something on every outfit" and that "It's an interesting style, not a cliche style. You throw stuff in there that people will recognize." Goldblum's character Dr. Zweibel was given a cowboy outfit to wear; according to costumer Radford Polinski, the character thought he was dressed appropriately for an audition for a person named "Buckaroo". The outfit itself was from Nudie Cohn 's Rodeo Tailors.