Cayman Islands Marriage License Laws:
Couples, including those arriving by cruise ship, can marry the same day they arrive in the Cayman Islands provided they have a non-resident’s marriage license granted by the Governor and two witnesses present at the ceremony.
When the Governor is satisfied with application, a special license will be issued and provided to the officiate.
Other than the special license, marriage can take place on the authority of a certificate issued by a civil registrar

Cayman Islands Marriage License Fee:
Non-residents must obtain a marriage license from the Deputy Chief Secretary’s Office at a cost of US $200

Identification Needed for a Cayman Islands Marriage License :
Passport or an original birth certificate with photo ID
Proof of citizenship and age (18 minimum without parental consent)
Cayman Islands Immigration Department pink entry slips or Cayman Islands international embarkation/disembarkation card for cruise passengers
Certified or original copies of divorce decree or death certificate
Letter from the authorized Marriage Officer (officiant)