Did you only try to get her to wear the dress once? Like all new things, I think a few attempts are necessary to get a toddler to cooperate. Also, were you in a strange place when she was being fitted? Is it possible to have the dress with you at home for a while for her to see, and to maybe get her fitted somewhere she's comfortable, like her own room? I would try to get her used to the idea. Practice dressing dolls in pretty dresses, talk about how pretty she'll be, let her "choose" how she'll wear her hair/what shoes to wear/nail polish color - whatever. It's not surprising that she's resistant - it sounds normal to me. As for getting her down the aisle, just make sure she's walking with someone she knows (your daughter sounds perfect), and put yourself at the end of the aisle so she's walking towards you. Even if she runs, people will think she's cute and no one will accuse her of "ruining" anything. Give her a fun job to do, like dropping rose petals. Don't give up and good luck!