I never thought that my kid sister would get married. Congratulations! (来源：专业英语学习网站 http://www.EnglishCN.com)
A wish from your brothers and sisters on your wedding day.
We wish you every happiness that comes from lasting love and all those things you are dreaming of.
Best wishes always. Keep in touch, sister.
Well sister, I am truly happy for you on your wedding day. Have a wonderful and romantic honeymoon.
It is hard to believe that I now have a sister-in-law. Congratulations, and may happiness be with you.
I hope you know what you are doing. But good luck anyway.
Please convey my congratulations to your Ted.
Please accept my best wishes for the two of you.