You should always address formal wedding invitations with Mr. and Mrs. and never should the addresses be abbreviated (example: road should be written out not just rd.)
You should write Mr. and Mrs. Husband's First Name, Last Name, or if there is a doctor in the house, you should address it Dr. and Mrs. Husband's First Name, Last Name.
A Medical Doctor, is addressed as, Doctor Simon Kit. A PhD Doctor, is addressed as Dr. Simon Kit, yet for a Married Woman Doctor, she's addressed as Doctor Jane Kit.
