This is not advise for a wedding outfit, but:
If you're in a pinch and your desi outfit is wrinkly (i.e. travelling and its all wrinkled from being in your luggage) and you don't have a steamer handy, turn the outfit inside out, hang it up seperately using non-wire hangers in the bathroom.
Take a nice long, hot shower and the steam from your shower will release the wrinkles!!
that barely works for men's dress shirts you'd have to leave it in there for like a week of showers lol