This floored us. According to The Knot, 48% of wedding guests buy new outfits for the festivities, which costs an average of £62. This seems easy to avoid when you can rent a designer dress on a site like Rent the Runway or Vow to be Chic for a fraction of the retail price. Bridesmaids and groomsmen have less leeway when it comes to their outfits; 77% buy new attire, spending an average of £160. Still, there are retailers like thredUP's The Mismatched 'Maid that help keep costs down. Also, bridesmaids: Dresses like this sparkly Badgley Mischka beauty retail for hundreds, but you can borrow many of them for under £50 on Rent the Runway. Together, we can bring that obscenely high average down next wedding season.