What would movie characters look like if they were played by actors of their real age

Sometimes when you watch a movie, it doesn't fit in your head: how can this hero be 16 years old if he looks at all 30? However, do not forget that this is cinema and the filmmakers specially select charismatic actors that the audience would like. What if movie characters were played by people of their real age? So that everything is honest, like in the book?

Clark Kent, "Secrets of Smallville", 14 years old.

Rosa, "Titanic", 17 years old.

Frank Abagnale, "Catch Me If You Can", 18 years old.

Pierre Bezukhov, "War and Peace", 20 years old.

Tyler Gage, "Step Forward", 18 years old.

Stefan Salvatore, "The Vampire Diaries," looked 17 years old.

Olympia, "Alexander", 55-60 years old.

Steve Sanders, "Beverly Hills 90210", 16 years old.

Andrea Zuckerman, "Beverly Hills 90210", 16 years old.

Woland, "The Master and Margarita", 45 years old.

Gleb Zheglov, "The meeting place cannot be changed", 25 years old.

Robb Stark, "Game of Thrones", 14 years old.

Jon Snow, "Game of Thrones", 14 years old.

Daenerys Targaryen, "Game of Thrones", 11 years old.

D'Artagnan, "D'Artagnan and the Three Musketeers", 18 years old.