Congratulations!!!
'Grats! 
Unless she asks you to, of course…
Conga-rats!!
Just remember the Two Rules Of Marriage:
- If she ain’t happy, you ain’t happy.
- When in doubt, refer to rule 1.
Congratulations and wishes of happiness to the new Plant couple! YAY!
Congratulations to the plants! Wishing you many happy years together!
Pssst!
Ixnay on the ailordermay!
Congratulations to you both!
I thought you were talking about Robert, but this is better news. Congrats!
Say what?
He thought you were posting that Robert Plant got married.
Congratulations!
I totally forgive you for making me snort soda the other day. 
CONGRATS!
Congratulations!