What cruise lines are owned by the parent company of Carnival Cruise Lines?

Carnival Cruise Lines is owned by Carnival Corporation & plc, which operates several other cruise lines. These include Princess Cruises, Holland America Line, Costa Cruises, AIDA Cruises, Cunard Line, and Seabourn. Additionally, Carnival Corporation also owns the British cruise line P&O Cruises and the Australian brand P&O Cruises Australia. Together, these brands represent a diverse range of cruise experiences catering to various markets and preferences.