The ship will boast a special venue for dinner, dancing and live performances "which are guaranteed to excite and surprise passengers", the company said in a statement.
Pacific Explorer will also include The Pantry, Angelo's Italian, Dragon Lady and Waterfront restaurants and resort-style pool areas, that can be found on some of P&O's other ships.
It was announced earlier this month that Princess Cruises' 77,000-tonne, 2,000-passenger Dawn Princess would switch brands in May 2017. The transfer follows two other Carnival Corp ships, Holland America's Ryndam and Statendam, which are transforming into P&O vessels Pacific Aria and Pacific Eden next month.
P&O Cruises senior vice president Sture Myrmell said his team was busy working on the redesign of Pacific Explorer.
“Just as we're preparing to welcome Pacific Aria and Pacific Eden next month, we're thrilled to have another ship on the horizon that will continue the exciting evolution of our modern Australian cruise product. We have grand plans for Pacific Explorer and we think her new features are going to cause a lot of excitement in the local industry."
Itinerary details for Pacific Explorer's first P&O season are expected to be released in a week or two.