Apologies go out to all of you soon-to-be wedding guests -- we have some bad news for you and your wallets.

According to a new American Express survey of 1,500 Americans, guests will likely spend an average of $592 per wedding in 2014. That's a 10 percent jump from last year's average spending ($539) and a 75 percent jump over the last two years, according to Market Watch.

This amount includes expenses such as pre-wedding festivities, transportation, attire, hotel and grooming, but does not include the price of the wedding gift. The average amount spent on gifts this year will be about $109 per wedding, but nearly twice that if the bride or groom is a close family member.

And, of course, it's not just guests that are dropping serious cash on the Big Day. According to The Knot's 2013 Real Weddings report, marrying couples are now shelling out $30,000 on average for their weddings and spending an average of $220 per guest.

For more on the American Express survey results, head over to Market Watch.