Bell-Jack joins from Carnival stablemate Cunard, where she currently serves in the line's business development team.
She brings additional sales experience from another Carnival brand, P&O Cruises, in both the UK and Australia, as well as expertise developing and nurturing trade partnerships.
In her new role, Bell-Jack will support Princess's business development team and help deliver the brand's strategic sales priorities.
Taking up her role on 21 September, she will report into Princess's Senior Sales Manager Sophia Lief.