Wedding Hairstyles for Low-maintenance Girls?

I am getting married in a few months and still can't decide on a hairstyle. Ideally, I would like to be able to wear it either down or half-up during the ceremony and then change it to an up-do for the reception, but I don't know what kind of style would be easy to convert like that. I'd love something natural that will stay in place! I am very low-maintenance so if it's gonna be falling down all night, I will just end up putting it in a pony tail (and I don't want that!) Any suggestions? Something romantic perhaps. My part is on the side and I have long hair. I love the whole wavy-look but my hair doesn't hold curls AT ALL.

Okok my answer is gunna get long haha
For the half up half down do
I recomend trying this before ur actual wedding incase u hate it
The night before wet ur hair the brush it all back into a ponytail in the middle of your head in the back
Then twist it outwards and spin it around the root of the ponytail or the hair tie
Secure it with a hair tie
In the morning when its dry take it out and brush it through
This will creat a wavy do
Then seperate the top of the hair from the bottom,
Take the top and put it in a ponytail in the back of your head
Do the same spining tecnique exept secure it with pretty bobby pins that will show, if your wedding is a beach wedding then use sea shell bobby pins
Finally take a rat. Tail comb and take the front part of your hair around your face and take the "tail" of your comb and loosen the hair around your face to frame your face

And for the all updo one
First go on youtube and learn how to do a french twist
French twist on both sides of your head to your ear, secure with bobby pins
Then do the twist tecnique in the back of your head in the middle

Finish it all off with some dangly earrings and a natural makeup look try a kim kardashian tutorial on youtube