Three people are so far confirmed dead and about 40 are unaccounted for.
The captain of the Costa Concordia has been detained for questioning, as police investigate why the accident happened in calm conditions.
Two French passengers and a Peruvian crew member died, and another 30 people were injured, two seriously.
The South Korean couple were located after rescuers heard voices from a cabin two decks down on the half-submerged ship late on Saturday, and they were reached a few hours later.
The couple, both 29 years old, were both in good health when they were brought ashore.Continued