look (one's) age
To have an appearance (especially one's face) that is consistent with what people expect someone to look like at that age. I don't look my age now that I have this beard, so I never have trouble getting into bars. With all these gray hairs, I'm really starting to look my age.
ˌlook your ˈage
seem as old as you really are and not younger or older: I was surprised when I last saw her — she’s really starting to look her age now.