18th Birthday Party Invitation Ideas 2016-07-07 | Lion Pick out the best 18th birthday party invitation ideas from our wide variety of printable templates you can freely customize to match any party theme. Also read: Despicable Me Invitations Printable Related posts:Lutheran Confirmation InvitationsBoys Sports Birthday InvitationsCandy Birthday InvitationsReligious Christmas Dinner InvitationsFormal Dinner Invitation SamplesPark Birthday Party Invitation Wording