With wedding season fast approaching, guests and relatives of happy couples across the country will turn their attention to the financial aspects of being a wedding guest. Going to a wedding can be an expensive business! New research from American Express has found that nearly a third of Brits will attend at least one wedding this year. The financial burden of being a wedding guest amounts to an average of £303 for each happy day. UK adults plan to attend on average three weddings in 2018, according to the research. This means wedding guests could spend a total of up to £15bn this year.