How do you address multiple Mr and Mrs?

When addressing multiple couples formally, you can use "Mr. and Mrs." followed by the last names of the couples if they share the same surname, such as "Mr. and Mrs. Smith." If addressing couples with different last names, you can list them as "Mr. Smith and Mrs. Johnson" or "Mr. Smith and Mr. Johnson" as appropriate. For a more inclusive and modern approach, consider using "Dear all" or "Dear [Last Names]" to encompass all parties without assuming traditional titles.