How do you become more articulate and intelligent in conversation?

I was watching a timothee chalamet interview where a journalist asked him a question about his new movie and he went into this question and replied with so much meaning and so much clarity and all his words were so well chosen. I guess it's something that develops overtime when you're being asked questions all the time but still i find it very hard to understand how certain people can find the exact words of what they want to say on the spot without even thinking too much.