Opposite was Timothy Bottoms. "It's the first time I've ever played the villain," said Bottoms. Helen Hunt, in her first feature film, has a supporting role as Tracy Calder, Harry's teenage daughter. Steve Guttenberg, in his first film role, has an uncredited bit part as a messenger at Magic Mountain who brings the plans for the Revolution to Calder and Hoyt. Craig Wasson, in his second film, appears as a hippie. Radio announcer Charlie Tuna also appears in the film as the MC for the concert and The Revolution coaster launch.