I disagree. John Cusack aged in sort of a step function:
15 (14) year old in “The Sure Thing” and “Sixteen Candles”
then
30 from “Say Anything” on.
I see Erin Gray (“Buck Rogers” TV show) at the San Diego Comic Con every year, and she is amazingly well preserved. It is only up close, and in person that you can see some signs of age. (The guy who played Buck can NOT make the same claim !)