''A clutch is always a chic option,'' says Niemerko, who divulges that if he's ever organsing a wedding with party favours, they will always be handed out at the end of the evening to avoid guests being forced to squeeze them into their inevitably small arm candy. While carrying a clutch bag around with you on a regular evening out can be a bit tedious (where do you put it when you're hitting the dance floor?) a wedding is one of the few occasions when you can leave it on the table without fear of it getting swiped. Alternatively, a mini cross-body (as seen at Valentino, Chanel and Hermès among others) is a very good option.
On the subject of extraneous accessories, are hats a necessity? ''Not many people wear hats anymore, which I think is a shame because they can look quite fabulous,'' says Niemerko.
Source : http://www.telegraph.co.uk/fashion/style/what-to-wear-to-a-wedding/