STYLETHREAD -- LET'S TALK SHOP!

I have a wedding to attend to on Sunday. It is in the middle of the day, and I am wearing a sundress type of dress. Now I was thinking about straightening my hair, but I just realized I am not doing to want to leave my hair down. So i was thinking about doing a messy wavy type of pony, since it is summer and the wedding is in the middle of the day. I was thinking the Olsen girls (their premiere looking days) as being my inspiration.My hair is think and naturally wavy when I let it airdry. So i would I go about this. I am a totally dummy when it comes to hair. So any suggestions. Thanks.