@mariojacobs,

Being ageless is a common trope in literature, film and television.

https://tvtropes.org/pmwiki/pmwiki.php/Main/TheAgeless

This character is Immortal, but not because they are Nigh Invulnerable or can regenerate any injury. They are immortal because they don't age, nor do they usually sicken. This character will never die from natural causes. However, they are just as vulnerable to injury as a normal person, and any normally fatal injury will prove fatal to them as well. This is frequently a racial trait of elves and almost always a feature of robots and vampires. ....

? ?

The Curious Case of Benjamin Button (2008)
https://www.imdb.com/title/tt0421715/

https://www.imdb.com/title/tt0421715/reference

Tells the story of Benjamin Button, 
a man who starts aging backwards with consequences.

Benjamin Button, a baby that was born looking like an old man, 
is taken in by a nurse at an old folks home. 
Over the years as Benjamin got "older" he appeared to get younger. 

Brad Pitt ... Benjamin Button
- - -

The Picture of Dorian Gray (1945)
https://www.imdb.com/title/tt0037988/

https://www.imdb.com/title/tt0037988/reference

Handsome, young, but morally corrupt Dorian Gray has his portrait made. 
As the years pass, he does not age,
but evidence of his sins are apparent in his portrait,
which grows uglier with each transgression.
He keeps it safely hidden in the attic.
But his mysterious behavior and ageless appearance begin to attract suspicion

Hurd Hatfield ... Dorian Gray

https://www.imdb.com/title/tt0037988/mediaviewer/rm3746625537/

.

Marvel Eternals also don't age.

I don't know if Benjamin Button should count. He ages, altought in a different way than normal humans. In fact at the end of the movie, while being a little child he suffers from old age dementia

bump 2025