 Johar, who is also a costume designer, wanted to set a new level for style in Hindi cinema with this film. He and his friend Manish Malhotra, the film's costume designer, made trips to London for costumes, much to the chagrin of his father and producer Yash Johar, who was concerned about the budget. Many of the costumes in the film prominently displayed logos from designers such as DKNY and Polo. In addition to the designer fashions, Johar also created a somewhat fantastical world where the students speak Hinglish and enjoy a pristine college campus, where there is no crime or hate, and traditional Hindu values are pervasive. Johar admitted that the look and feel of the college scenes in the film were patterned after Beverly Hills 90210, saying, "The art, the costumes, tilt toward the West, but the soul of the film is Indian." He hired Sharmishta Roy as art director, and told her to produce something similar to Riverdale High School of the Archie Comics, with some 90210 influence as well. Johar said of the outcome, "If you see KKHH, Shahrukh plays Archie, Rani Mukherji plays Veronica, and Kajol played Bettie. It was exactly that. And the principal looked like Weatherbee, and Ms. Grundy was Archana Puran Singh." Johar also hired Farah Khan to do the choreography, Jatin-Lalit to provide the music, Santosh Thundiyil as cinematographer, and Nikhil Advani as his associate director. Shabina Khan assisted Manish Malhotra with costume design.
