The wedding begins with a procession, which is the same as a typical Sunday mass. That is, the people go down the aisle in this order:
With weddings, the couple to be married goes after the priest(s). They walk side by side, instead of going separately or with other people. Katie and I are both fine with this.
Katie's daughter, Mary, wants to be the flower girl. Flower girls are not an official part of Catholic weddings; they're just an optional thing that people do in the United States. But Mary will have a huge meltdown if she doesn't do it. I figure we'll have her go first in the procession. That's where flower girls usually go, right?
It is also optional to have the parents and the two witnesses (who will sign the legal document) be part of the procession, after the married couple. People usually stick the bridesmaids and groomsmen in here, even though they're not part of the wedding ceremony at all. I'm not particularly keen on this idea; I would like it better if just Katie and I went down the aisle together, instead of Katie, me, and a parade of other folks.