Many films require the characters to age during the story, or tell the story in flashback from an older perspective. Less often an actor or actress undertakes the role of a character considerably older than themselves. Particularly for women there has been a tendency for the ageing to be handled, shall we say, delicately: the studio didn’t want to portray a star with wrinkles or the star herself objected. But an increasing number of makeups have gone much further than the gray wig. Sometimes TV mini-series such as Roots have done better than many films.
There are so many of these makeups that I have had to sub-divide the section by the date of the movie.
You will also find many examples of ageing makeup in the creating a likeness section taken from various biopics.