Michael Keaton as Kevin

Geena Davis as Julia

Bonnie Bedelia as Annette

Christopher Reeve as Bob 'Bagdad' Freed

Ernie Hudson as Ventura

Charles Martin Smith as Kratz

Gailard Sartain as Lee Cutler

Ray Baker as Ray Garvin

Mitchell Ryan as Lloyd Wannamaker

Willie Garson as Dick

Paul Lazar as Harry

Richard Poe as Tom

Harry Shearer as Chuck

Steven Wright as Eddie

Jodi Carlisle as Doris Wind

Cynthia Mace as Michelle Kortz

Mary Pat Gleason as Desk Clerk

Jon Favreau as Debate Control Room Operator (uncredited)

Khris Kaneff as Party Guest (uncredited)

Richard Schiff as Sound Technician (uncredited)

Heather Medway as Make-Up Girl (uncredited)

Yasmine Abdul-Wahid as Female Student

Michelle Holden as Beth Yeats

Peter MacKenzie as Andy