Michele Andjel joins P&O as PR manager on 11 April, replacing Bronwen Griffiths, who left to join Thomas Cook last July.
The company's nine-month search to fill the post, the remit for which includes crisis management, meant it was without a top communicator during the Aurora cruise ship farce in January.
Andjel will be charged with securing positive publicity for low-priced, informal holidays aboard new P&O ship Arcadia.
The operator wants to lower the age group of typical P&O cruisers - its average customer is an affluent 57-year-old - by attracting less affluent groups who want a 'stress-busting cruise'.
P&O head of brand marketing Philip Price, to whom Andjel reports, said: 'Cruising is less formal than it used to be and we do a lot more to enhance the whole experience - from language classes to tai chi.'
He also emphasised the 'affordability' and 'Britishness' of P&O cruises.