The line revealed details of ship’s refit, including a makeover of restaurants, bars, cabins, public spaces and entertainment areas to create a new "elegant and sophisticated look."
The Oriental and Peninsular restaurants, ship's main dining rooms, will each receive brand-new colour schemes, with soft furnishings and upholstery replaced throughout. Staterooms will see a colour palette of soft grey and cream introduced, cabin furniture will be replaced and bathrooms will be updated.
Richmond International, leading interior design firm, who was also responsible for P&O Cruises' Britannia interior, as well as luxury hotels all over the world, was tasked with creating ship's new look.
Paul Ludlow, P&O Cruises' senior vice president, said:
"After listening to guests' feedback, we are investing in updates to many areas of the ship, but what is key is that we are retaining her unique charm and traditional character.
"With her teak promenade and lido decks, we know that Oriana holds a special place in the hearts of many of our guests and so we will be keeping her most distinctive features, such as her Tiffany glass ceiling and other well-loved classic touches."
The thoroughly British Oriana ship, launched in 1995 by HM the Queen, last received a refurbishment in 2011, when the line announced it would become adult-only.