In American English your invitation should read as follows:

You are invited to join
Mr. & Mrs. Larry James Williams
in witnessing the joining of
James Larry Williams (full name)
and
Anna Elizabeth Leary (full name)
in Holy Matrimony (depending on your religion)
05 December 2009
Eleven O'Clock
Saint Peter's Church
________Street
Doha, Qatar

Good Luck!
Pam