Ronald Leigh-Hunt began his acting journey by training at the esteemed Italia Conti School. He made his professional debut in regional repertory theatre, gradually transitioning into film appearances from 1950 onwards. His versatility as an actor led to a steady stream of work, with him often being cast in subtle yet authoritative or aristocratic roles. Cultivated and refined, Leigh-Hunt's later years were marked by his distinguished white hair, resonant voice, impeccable manner, and stylish attire, which made him a notable figure in the industry.
Throughout his career, Leigh-Hunt appeared in numerous big-budget films, including the notable releases Khartoum (1966) and The Omen (1976). He also had the opportunity to showcase his talents on the stage, starring as Florenz Ziegfeld Jr. opposite Barbra Streisand in the West End production of 'Funny Girl' in 1966. On television, Leigh-Hunt was a sought-after guest star, frequently appearing in prominent British series such as Z Cars (1962) and Doctor Who (1963). Additionally, he had a recurring role as Colonel Buchan in the popular children's television series Freewheelers (1968).
Leigh-Hunt's connection to the acting world extended beyond his own career, as he was a cousin of the accomplished actress Barbara Leigh-Hunt.