There’s a Zen koan that asks the same question, but in different terms: What is your original face before your parents were born?
This leads to a very interesting perspective. I have this story about myself, which is largely the history of this particular body as preserved in incredibly sketchy memories, or extrapolated from various points of reference. What if I set that autobiographical narrative aside and look just at what is (and what isn’t)? That’s my “original face” that has no reference to my parents, or any other starting point.
I find that this original face has no age at all.