In most cases, every additional passenger has to pay an additional cruise fare. Passengers 3-8 usually pay less than passengers 1 & 2, and for some cruises there is special offer where the cruise fare for passengers 3 & 4 is free and they only pay taxes and fees.

You can typically add a guest to your Norwegian Cruise Line (NCL) reservation after booking, provided that your specific stateroom category has the capacity for an additional person and the ship has not reached its total maximum passenger occupancy. Most cabins are designed for two, but many have "pullman" beds or sofa beds that allow for a third or fourth guest. To make the change, you must call NCL or your travel agent directly, as this cannot always be done through the online portal. Be prepared for the price of the additional guest to be based on the current prevailing rate at the time of the change, which may be higher than what you paid for the original passengers. Furthermore, you will be responsible for the additional guest's port taxes, fees, and gratuities. It is a high-value tip to check for "3rd and 4th Guest Free" promotions, which NCL frequently runs, as these can significantly lower the cost of adding a family member or friend to your existing cabin reservation.