Congratulations!  恭喜！

Many congratulations on your marriage!  祝你们喜结良缘！

I'm so happy for you.  我很为你感到高兴。

Best wishes!  献上我最美好的祝福！

Good luck!  好运！

I'd like to wish you every success.  祝你事事顺利。

I hope everything goes well with your married life.  祝你们婚后生活事事顺利。

I hope you get well soon.  祝你很快康复。

Enjoy yourself!  玩得开心点！