What to Wear to This Wedding?

If it were me I would wear one outfit to the wedding that was summery, floral and feminine, suitable for the weather and wear that to the champagne reception also. For the evening reception I would change into the traditional little black dress. If you have the time and place to make the change that would be fine, if you don't then you should find something that will work between the wedding and formal dinner, like a strappy dress with a jacket that could be taken off in the evening.

S.

I would wear a sun dress that can be dressed up and down. With a wrap for the church and perhaps the reception if it gets cold. I doubt too many people will be changing!

I would not change. Surely the bride does not expect guests to do this. If you are concerned about not being dressy enough, I would go with the little black dress. That seems to go well either way and you could dress it down for the afternoon and up for the evening by changing purses, shoes, and accessories if you feel the need to.

Hey K.-
I disagree with the other posts. I suppose it depends on the couple, but if you expect it to be a top notch affair I would plan to change. I was once at a wedding in Chicago that was during the day with an evening reception (high end everything) and decided to wear one dress for both. I felt completely out of place at both events. Everyone changed. I would wear something simple to the wedding and reception (short sun dress and strappy heels) and something more appropriate for an evening affair (back cocktail dress with evening accessories).
IMHO it's better to be overdressed than underdressed as long as you're not wearing your wedding dress you should be fine (HA!)

Buying two dresses would just be a headache for you. I would go for a light colored dress like pale blue. One that I could add a scraf or a belt to. Then when it's time to go to that A list affair, add some jewerly. Change shoes, something a little fancy and add a hair pin to your hair. Everyone knows that great hair, jewerly, and shoes is what makes the outfit.