No. You can visit as a tourist. You need to show your own funds, travel history and ties to home country (job offer with letter, spouse/children staying behind, business, investment properties).
Don't know when the wedding is but processing can take many months depending what country you live in. So if within next couple of months you may not get a response.
You want to apply well AHEAD of the wedding date to get the visa . Just putting in the date of the wedding wont push your application to the front of the que. The date is irrelevant in the whole scheme of things.