Remember Elizabeth Taylor, Rock Hudson and James Dean in Giant? They were all young and beautiful so what happened when it came time to age them? They got a can of grey spray paint and sprayed their hair. My favorite part was Dean. Not only did he set a trend decades before its time in the movie by having a pompadour in the twenties but when he gets older it's still there, as full as ever only it's grey and shiny.
With Ash Wednesday they did a much better job with Taylor and in Citizen Kane Orson Welles had some fantastic make-up applied. But is that how they looked when they really did get older? With Taylor it's a close call. With Welles it's a total miss. And Winslet? I'm betting she looks a lot better than her character does when she reaches that age.