The Golden Age of Hollywood saw Marlon Brando, James Dean and co cement themselves as the enduring cinematic pantheon and command the silver screen with style. There were sharp lids too: with side-partings, quiffs and eyebrows strong enough to bench 70kg.

But perhaps the Golden Age never ended, or at least in the grooming sense. For Brando and Dean and every other debonair leading man lives on in the bygone era's modern representative: Leonardo DiCaprio.

leonardo dicaprio ice on fire
Getty Images

At the LA premiere of HBO's climate saving doc Ice On Fire, the 44-year-old ever-so-slightly rejigged his usual style - the classic side-parting sweepback - for a slick-back proper. Such style, such lustre, such pure, unbridled slickness! It's subtle, yes, but this sort of pushback is flatter, smoother and will work in this summer and beyond. Funny that, since it worked just as well in the heady summers of the 1950's.

Like all things DiCaprio, it's eternally classic. Not quite the follicle statements of fashion week, but hardly forgettable either. And, by channelling the cuts of yore for at least two decades now, the Once Upon A Time... In Hollywood star stands toe-to-toe with the old guard.

That means in fifty years time, when everyone lives forever (and underwater), we'll still be looking to Brando for classic inspiration. But you'll find Leo too up on the barber's wall.