SS Arandora Star was a British registered cruise ship operated by the Blue Star Line from the late 1920s through the 1930s. At the onset of World War II she was assigned as a troop transport and moving refugees. At the end of June 1940 she was assigned the task of transporting German and Italian internees along with prisoners of war to Canada. On 2 July 1940 she was sunk in controversial circumstances by a German U-boat with a large loss of life.

Initially named Arandora, she was built by Cammell Laird & Company, Limited for the Blue Star Line in 1927. As completed the Arandora measured 12,847 gross register tons (GRT), was 512.2 feet long, a beam of 68.3 ft and accommodated 164 first class passengers. She cruised at a service speed of 16 knots. After a refit in 1929, she could accommodate 354 first class passengers, her tonnage was increased to 14,694 gross tons

As Arandora she sailed from London to the east coast of South America from 1927 to 1928. In 1929 she was sent to Fairfield Shipbuilding & Engineering Company Ltd. of Glasgow for refitting. During the refit, her gross tonnage was increased to 14,694 and first class accommodation was increased to 354 passengers. A tennis court was also placed abaft the funnels on the boat deck, and a swimming pool was installed in the after well deck. Upon completion, she returned to service as a full-time luxury cruise ship. At the time of this refit, she was also renamed Arandora Star. The renaming was done to avoid confusion with Royal Mail Ships which typically bore names beginning and ending in 'A'.^{[citation needed]}