A casual evening wedding doesn't mean that wedding guests should be wearing jeans and t-shirts. Men should wear a dark button down shirt and a nice pair of pants, and women should wear a chic but simple dress. Be comfortable, but still look pulled together and stylish. My rule of thumb is to look for a dress I'd wear on an evening at my grandparents house, or I could wear to a casual workplace function.

This Jones New York dress has an easy and relaxed style. The jersey knit is so comfortable, you don't even need a zipper to get into it!