Josh Weinstein, corporate treasurer of parent company Carnival Corporation, will become president of Carnival UK following the planned departure of current chief executive David Noyes in July after six years in the business.
Weinstein will be responsible for overseeing both P&O Cruises and Cunard.
He will report to Stein Kruse, currently chief executive of the Holland America Group, who is promoted to group chief executive of Holland America Group and Carnival UK.
Noyes will remain in his role until July 18th to ensure a smooth transition.
The Southampton-based Carnival UK executive team will then report to Weinstein, following his move to the UK in April.
Carnival UK chairman David Dingle will continue in his role.
A graduate of the University of Pennsylvania and the New York University School of Law, Weinstein, 43, joined Carnival Corporation 15 years ago as an attorney in the corporate legal department before assuming the role of corporate treasurer.
Carnival Corporation chief executive, Arnold Donald, said: “Some time ago, David Noyes advised me that he wished to step down as chief executive Carnival UK during 2017 to spend more time with his family.
“David has excelled in his time as chief executive of Carnival UK and has planned a smooth and effective transition.
“We greatly appreciate his leadership, his team spirit and the many important contributions he has made to our success.”