A living legend just two years shy of a century on this Earth, and an equally famous offspring now into his eighth decade, Kirk and Michael Douglas enjoy a warm, cordial bond. Only the flinty hearted could not be moved by the two men's mutual affection these days - the uninhibited kisses on the cheek that accompany every greeting; the worn-on-sleeve sentimentality; the way each man's charisma seems to feed off the other's.
They get on well, and so they might, for the amount they have in common borders on the uncanny: the chronic urbanity, the turbulent love lives, the brushes with grave illness, the shared experiences of personal tragedy, and the belated existential peace. (They're also on a pretty level pegging when it comes to their status as lotharios - when a British tabloid story suggested Michael had been hospitalised for sex addiction, Douglas Sr responded, 'What's wrong with sex addiction? I've had it all my life. It's never bothered me.')
But over the decades their relationship has sometimes been a strained one, with, in all likelihood, feelings of paternal absence colouring both men's formative years ('Kirk was all-consumed, was overworked,' Michael has said of his own childhood. 'Probably like myself at a certain time in my life'). Kirk's childhood in 1920s New York was one that hardened him, as Michael later phrased it, into 'a very intense, talented survivalist'. Kirk's father was originally Herschel Danielovitch, a Russian-Jewish rag trader émigré who had little time for his offspring and deserted the family when Kirk was a child.
Fighting abject poverty by selling snacks to mill workers, and doing stints as a gardener and a janitor, Douglas Sr (whose name was Issur Danielovitch before the family became Americanised) fought in the navy during the second world war before marrying Diana Dill, a Bermudan actress, in 1943, and starting a family. It turned out he'd learned domestic detachment by osmosis from his father (he 'kind of formed a cast-iron stomach' and 'learned pretty early to stay away', Douglas Jr has said), and he and Diana divorced in 1951.
As we know now, it would be incorrect to say that Kirk never looked back when it came to his family. But for a long while he probably only proffered an occasional glance. Utterly driven when it came to his career, this wayward former wrestler strode into Hollywood and put it in a half-nelson hold, ditching the studio system to set up his own production company (unheard of in those days), hiring a screenwriter, Dalton Trumbo, who'd been blacklisted for having communist ties, and setting about becoming the most famous man in the world by starring in vast cinematic hits such as Champion, Lonely Are the Brave, Paths of Glory, The Vikings, and Spartacus.
So iconic a name was Kirk Douglas by the time Michael embarked on an acting career in late-sixties New York, his father didn't so much cast a shadow as inflict a chilling, anxious complex. The perceived silver spoon effectively removed from Michael the 'nice try, no cigar' safety net most young actors can rely on, and he frequently used to be sick into dustbins before performances.
Ultimately, though, Michael Douglas looked the unrealistic expectations in the eye, scowled a death stare, and set about living up to them: his stellar movie career and impressive range - rifle-toting avian smuggler in Romancing the Stone; New York attorney and bunny boiler prey in Fatal Attraction; a psychopathic stockbroker who became a symbol for unrestrained greed in Wall Street - speak for themselves. For the perceptive cinema-goer, what the two men have in common is nuance.