Do you need a passport to go on a cruise Norwegian cruise?

Norwegian cruises starting & ending in the U.S. don't require it, but it's highly recommended for unexpected travel changes.
Venturing beyond the U.S. or flying in/out? Pack your passport! It's mandatory for all guests, even U.S. citizens, on international voyages or cruises with foreign air travel.
Double-check specific requirements based on your itinerary and nationality. Smooth sailing!