The bride does know about it and she is at a lost as to what to do. My plan was to just order the smaller of the two sizes I am inbetween because the shop said they could let it out alittle if they need to. I have lost 10 pounds sense we did our measurements so I know it will fit. I called the shop to ask about sizing the dress down if I need to and they said it can only be sized down two sizes. I think I will be fine with that. I figured I would order what fits now just incase I do not loss any weight. The good part is the dress is only fitted around the breast area but when I loss weight that is normally the first place I loss. Its funny because two other girls in the wedding are also pregnant so they are worrying about theirs not being big enough.