Young and old actors who played the same character. How similar are they?

When, after many years, you return to well-known movies and series, you can discover acting performances that you would not expect. All the more so because it often concerns younger versions of important characters, which we see through flashbacks or other plot tricks.
Buzzfeed has collected lists of young actors and actresses who played younger versions of famous characters from movies and series. We also have situations where the story first dealt with young incarnations, and then the older ones were presented. With this type of situation, we can often find well-known names of once child actors and actresses who are now making their own careers. Interestingly, there is one actress who can be safely described as a chameleon. McKenna Grace she played as many as four juvenile versions of the character, including playing as a young one Margot Robbie and Brie Larson.