Undergarments for wedding dress

Hi, I'm going to have my alterations done for my dress soon. The tailor asked me to bring the undergarments that I will be wearing. I'm going to be wearing a dress kind of like this: http://www.projectwedding.com/photo/list/jagnsis?thumbs_page=4&photo_to_show=10783 It's strapless, form fitting, and is somewhere between a trumpet and modified A line. I've heard some gals wear spanx. Is it really necessary to wear an undergarment?

I think it depends on how in shape you are. =) I'm probably going to wear some spanx because I need help wherever I can get it. =)

I am getting something like this, but in "Nude", for under my gown: http://www.amazon.com/Miraclesuit-Shapewear-Control-strapless-briefer/dp/B000HL1LL4 This one is by Miraclesuit...I also like some similar ones by Flexees...

My seamstress actually sewn in "cups" for me, so I didn't have to worry about undergarment for the dress.

I got a corset from Wacoal because I need help "smoothing out" my torso and some extra boobage.

Not sure if it's necessary, but it makes me feel like I look better in my dress (you know what I mean?).

I'm getting "cups" sewn into the dress as well...but I'm thinking I might need something else to "smooth" out my tummy...any ideas?

How about a "waistnipper"...here are some options by Flexees: http://www.maidenform.com/catalog/thumbnail.jsp?parentCategoryId=3&categoryId=28 Personally, I prefer the ones attached to a brief, rather than one on it's own, as the unattached ones tend to roll when you sit... This my favorite...it does the job and is still somewhat comfortable: http://www.maidenform.com/catalog/product.jsp?productId=70854&categoryId=32&wtlCategory=Flexees%20®%20Shapewear&parentCategoryId=3 It also comes as a brief, if you don't want the thigh slimmer part... http://www.maidenform.com/catalog/product.jsp?productId=17864&categoryId=32&wtlCategory=Flexees%20®%20Shapewear&parentCategoryId=3 I love what spandex and steel coil boning can do for my body under clothes! :-)

I'd go for the all-in-one as mentioned above. When I was in my friend's wedding, I wore a "waistnipper" and a strappless and it was pretty uncomfortable. That, and you still have to worry about the little fatty rolls that peak out in wierd places when you have too many garmets!