The first and most notable of these will of course be the bridal gown she wore the first time she met the Doctor. A good choice for cosplay, as there are bound to be a few knocking about in local thrift stores, but be careful. Donna’s not the only redhead to have rocked a bridal veil in recent Whovian history. Either learn to accept that some people are going to think you’re Amy Pond (and enjoy putting them right) or pick another costume.
Then there’s the Agatha Christie outfit, the Pompeii outfit, each clearly recognizable in their own way, and as they’re not the sort of thing most people wear to go to the shops, definitely worth considering…
But the most important accessory of all is Donna’s attitude. It’s that projected insecurity-as-bullishness thing she does so well. Always speaks her mind, even before she has fully made it up, sometimes. Put that on, and you’ll BE Donna.
Anglophenia’s “How...dress like” guides