She was born Moira Shearer King at Morton Lodge in Dunfermline, Fife, Scotland, the only child of civil engineer Harold Charles King and Margaret Crawford Reid, née Shearer. In 1931 her family moved to Ndola, Northern Rhodesia, where her father worked as a civil engineer and where she received her first dancing training under a former pupil of Enrico Cecchetti. She returned to Britain in 1936 and trained with Flora Fairbairn in London for a few months before she was accepted as a pupil by the Russian teacher Nicholas Legat. At his studio she met Mona Inglesby who gave Shearer a part in her new ballet Endymion, presented at an all star matinee at the Cambridge Theatre in 1938. After three years with Legat, she joined the Sadler’s Wells Ballet School. After the outbreak of World War II, her parents took her to live in Scotland. She joined Mona Inglesby’s International Ballet for its 1941 provincial tour and West End season before moving on to Sadler’s Wells in 1942.

In 1950, Moira Shearer married journalist and broadcaster Ludovic Kennedy. They were married in the Chapel Royal in London’s Hampton Court Palace. She and Kennedy had a son, Alastair, and three daughters, Ailsa, Rachel, and Fiona. Shearer died at the Radcliffe Infirmary, Oxford, England at the age of 80.

Shearer retired from ballet in 1953, but she continued to act, appearing as Titania in A Midsummer Night’s Dream at the 1954 Edinburgh Festival. She worked again for Powell on The Tales of Hoffmann and on the controversial film Peeping Tom (1960), which damaged Powell’s own career.

In 1972, she was chosen by the BBC to present the Eurovision Song Contest when it was staged at the Usher Hall in Edinburgh. She also wrote for The Daily Telegraph newspaper and gave talks on ballet worldwide.

The choreographer Gillian Lynne persuaded her to return to ballet in 1987 to play L. S. Lowry’s mother in A Simple Man for the BBC.