Invite question

How do I address the outer envelope if the wife is the Dr.??

Mr. and Dr. John Doe????

I dont know, I feel like that doesnt sound righe?

From The Knot:

'Q. What if the woman is a doctor and the man is not? Does the woman's name come first because of her title?

'A. Yes, the spouse with the professional title is listed first. Outer envelope: 'Dr. Kate Randolph Mr. Brian Randolph.' Or, 'Dr. Kate Randolph and Mr. Brian Randolph' (if it fits on one line). The inner envelope would read: 'Dr. Randolph and Mr. Randolph' or 'Dr. and Mr. Randolph.'