In 1974, she married the television and film director Christopher Morahan[1] They were together for over forty years and often worked together.

[4] Carteret's extensive life in the theatre from 1964 to 2015 is catalogued in the British online database Theatricalia.

[5] Carteret is best known for her role as police inspector Kate Longton in the BBC's long-running 1980s television series Juliet Bravo.

Other television credits include The Saint, The Pallisers, Frederic Raphael's The Glittering Prizes, Eskimo Day, Star Maidens, Peak Practice, Holby City, and Casualty.

Carteret has also voiced Miriam in the Welsh Christian animated television series Testament: The Bible in Animation and every female character in the British children's television series Forget Me Not Farm (Following the death of Mike Amatt (1949 - 2021, aged 71) who played Scarecrow, she is now the last surviving cast member of the show).