Please accept our most sincere congratulations upon your holy matrimony with... and very best wishes for all the good future in the world．
请接受我对你和……的神圣结合的最诚挚的祝贺，并祝愿你俩幸福无量。

Allow me to join the chorus of congratulations upon your recent marriage．
值你新婚之际，请允许我加入祝福的行列。

My husband joins me in hoping that you have a long and happy and prosperous life together．
我丈夫和我一同祝愿你俩美满幸福，白头偕老。

Wishing you many happy returns of the wedding day．
正值阁下新婚之禧，恭贺幸福无量。

My heart felt congratulations on your coming happy union!
谨向你们即将到来的幸福结合致以衷心的祝贺。

My sincere congratulations on this auspicious event of yours．
值你俩大喜之日，谨致最诚挚的；况贺。

Our best wishes to the two of you for a happy marriage filled with all the good things．
(我们)愿你俩婚姻美满幸福。

Best wishes from one of your old friends on your engagement.
在你们订婚之际，请接受一个老朋友最美好的祝愿。

My very best wishes to you for a lifetime of happiness．
向你俩致以最美好的祝愿，祝你们终生幸福。

I take great pleasure in sending here with a little wedding present in celebration Of the happy event．
喜送小小礼品一份，庆贺这一大喜大吉之事。

We send you both our love and best wishes for every happiness that life can bring．
我们谨向你俩祝贺，愿你们的婚后生活无上幸福。

Let me wish you and your bride every joy and the best of everything．
祝你和你的新娘幸福欢乐。(文章：中青网英语角)