"Proper invites have not been sent out but instead guests have been given a save the date notice," the source told Us.
The rehearsal dinner – described by the source as "an intimate affair" for "family and close friends only" – will take place on Friday.
On Saturday, "all guests will be transported in shuttles to the wedding location," the source explained.
Considering they have been engaged for just over a month, it sounds like it is a shotgun wedding. I mean why else are they suddenly rushing to the altar?