So many negative/simplistically-directed responses surprised
It's interesting because most people that are attractive are associated with negative things because MOST of them are the type to make fun of others.....
.....as are MOST people, ugly or not, that are posers in general.
Because of that stereotype, it's quite common to see gorgeous adults that are actually quite friendless due to others being jealous/biased.
In the end: I'd treat the pretty person the same as everyone else; accordingly to their personality.
I'd talk to them, duh. Is there any other answer? I would say that I'd flirt with them, but since it's literally impossible for me to talk to anyone who isn't a small child or a relative without flirting with them, that's kind of a given.
Sometimes i find it difficult to respond in a normal way to an attractive person. I usually just want to look at them and admire their beauty but i know that that is just weird. So i tend to look at them quickly (like 1 sec) and then turn away cause i don't want to be rude. It's not always meant to be pervy, for instance i'd really just like to draw them but i can't because well that's kinda weird.. Especially if i don't know them. If i'm single and i like their personality i'd probably flirt with them.
I'd treat them the same way I'd treat anyone else how walked in the room. Unless I liked their style/they had something of interest on them/they sat next to me I probably wouldn't mind them much attention.