Fancy dress ideas for a horse and rider?

Question:

Fancy dress ideas for a horse and rider?

please its a fancy dress comp and i nedd to have a really good idea and suggestions would be great thankx

Best Answer - Chosen by Asker:

For English, customary is jodfers, tailored shirt and vest to match the pants, official leather riding boots, a riding hat to match with/without straps.
western saddle, Wrangler jeans, (blue, black) western tailored shirt and vest, with cowboy hat preferably a Stetson, cowboy riding boots.