Director Sydney Pollack is also the voice of Les, Hallie Martin's boss, on the phone when she calls from the coffee shop to say that she's interviewed Sonny Steele.
This movie was inspired by a case where The Sonny and Cher Comedy Hour invited Penny Chenery in 1973 to bring her horse, the legendary Triple Crown winner Secretariat to appear on the show. Chenery, knowing her horse wouldn't care for a TV studio, declined.
When Gus responds to Hallie Martin's query about Sonny's whereabouts, the lines "like a flutterin' bird... like a mist... and blocks out the sun" are actually taken from Ovid's Metamorphoses: they are spoken by the Dawn, who laments her son's death on the plains of Troy.
Sydney Pollack:
Making a pass at Jane Fonda during a Las Vegas convention, and dealing cards in the first casino scene a Caesar's Palace. He is wearing a white shirt.