Born in Auckland, New Zealand, she undertook her early training in Australia, and later at the Royal Ballet School. She then danced at Ballet Rambert (under Peggy van Praagh) and The Royal Ballet. She returned to Australia in 1970, quickly rising to Resident Principal Dancer with the Australian Ballet, where she remained until 1976.
She is particularly noted for her partnerships with Rudolf Nureyev, first in the Nutcracker while with the Royal Ballet, and subsequently in the role of Kitri in Don Quixote for the Australian Ballet.
Lucette Aldous married Maurice Evelyn Forbes Fitzmaurice, a barrister, in 1960. They divorced in 1973. She later married fellow artist Alan Alder. They have a daughter, Floeur Alder, who is also a dancer.