Casting By

Okay, imagine you're playing pretend and you want to be a unicorn. You can use your imagination to pretend you have a horn and gallop around with your friends. But what if you want to show other people what you're pretending to be? That's where casting comes in.

When making a movie or a play, casting means choosing the actors who will play the different parts. Just like you choose which friend will be the dragon and which one will be the princess in your pretend game. Casting is like choosing who will wear which costume and deliver which lines.

Now, sometimes a director or producer wants a certain actor to play a part, even if that actor isn't the obvious choice. Maybe they have a certain look or skill that the director thinks will be perfect for the role. To "cast by" means to choose an actor specifically for that unique quality, even if they might not be the most obvious choice.

So, casting by means choosing an actor based on a specific quality or characteristic that they have, rather than just going for the most obvious choice. It's like picking the friend who might not be the tallest, but who has the best dragon roar, to play the dragon in your unicorn game.