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Yes they will be but you do join a cashless society when you join the ship everything is charged to your seapass account, except when you go into the casino. If you don't intend paying by credit card you may need dollar cheques to settle your accout before you leave the ship. I think we took some Australian and New Zealand dollars with us for minor expenditure when we were off the ship the rest went on credit cards. We did this trip last year but Sydney to Auckland and had a ball, so look forward to a great cruise.
Yes. Currency is US Dollar in all Celebrity ships in whatever part of the world they are sailing.