How do I address wedding invitations to a family?

Addressing a family follows a clear order across the two envelopes so it is obvious who is invited.

• Outer envelope: list the parents, for example "Mr. and Mrs. David Thompson."
• Inner envelope: add the children's names below the parents, listed oldest to youngest.
• Children over 18 should receive their own separate invitation.
• Being explicit about who is included prevents confusion about the guest count.