don't outshine the bride, she might cut you

In Miss Biscuit's class (years Reception, one and two) they do this thing where they pretend to perform a wedding. (it is part of their RE lessons... I don't understand all of it, but it is something they do.) Miss Biscuit told me with great excitement that she gets to be a bridesmaid. She gets to dress up and everything. (The kids were told they could wear a nice/fancy dress but not a character costume.) She said she wanted to wear this once princess dress she has. It is an over the top dress with a petty-coat/hoop-skirt so it is massive, and it is has lots of details and well it is not a shy dress.
We had a conversation about how it might be better to choose a slightly less fancy dress because it is considered in slightly poor taste to over shadow the bride. I don't know if the little girl playing the part of the bride would mind all that much but still, it is a good thing to learn early. She may choose something else.