A source close to Simpson and Wentz told UsMagazine.com that the couple was going to wed this Saturday (May 17) at a "top secret" location.
According to this source, official invitations have not been sent , but guests have been advised to leave this time available.
The rehearsal dinner for family and close friends will be on Friday (May 16). The source added that the guests will be taken by shuttle to the ceremony.
Simpson, 23, and Wentz, 28, announced their engagement last month.