I wouldn't wear it for anything,never mind a wedding. The design makes the dress more awful,as well as the dress being oldie looking.
In my sewing class at school,in the 1950 era, I made a cotton,three tiered skirt,like the bottom part of that dress,it had little tiny flowers on it though,and I wore it with a tight belt,around my then 22ins waist. so it wasn't shapeless looking like this dress.