David Macmillan's formative years were characterized by a secluded educational experience, followed by a brief tenure as an army officer, which he left in 1955. This marked a significant turning point in his life, as he subsequently embarked on a journey in the performing arts. The next chapter in his career saw him enroll at the esteemed Webber-Douglas School of Dramatic Art, where he received rigorous training between 1956 and 1958. During his time at the esteemed institution, Macmillan distinguished himself by receiving the prestigious Spotlight Award and the coveted Margaret Rutherford Medal.
Macmillan embarked on a multifaceted acting career that stretched across a decade from 1958 to 1967, showcasing his versatility in various mediums, including radio, television, and theatre. His extensive theatrical experience was marked by a wide range of performances at numerous esteemed theatres throughout the United Kingdom, boasting an impressive repertoire that included the Birmingham Alex, Edinburgh Gateway and Lyceum, Glasgow Citizens, Harrogate, St. Andrew's, Wimbledon, Richmond, Colchester, Salisbury, and Belfast.
Notable beyond his stage presence, Macmillan's professional endeavors extended to various radio productions, showcasing his versatility as a performer. His radio credits included esteemed programs such as "Children's Hour", "The Archers", and plays, as well as school broadcasts, demonstrating his ability to adapt to diverse formats and audiences.
Furthermore, Macmillan's television career flourished between 1960 and 1967, with a staggering 50-plus appearances across a range of popular shows. Some of his notable television credits include the medical drama "Dr Finlay's Casebook", the family-oriented series "The Flying Swan", "The George Kidd Show", a mystery program titled "The Dark Number", the drama series "Compact", the adventure series "The Saint", the historical drama "William", the crime drama "The Other Man", the aviation-themed series "North Flight", the biographical drama "Kipling", the stage adaptation "No Thoroughfare", the comedy series "Pack Up Your Troubles", the military drama "The Big Pull", and the crime drama "Gideon's Way".
After concluding his tenure in the entertainment sector in the year 1967, Macmillan redirected his professional trajectory, opting for a lucrative and fulfilling senior management career in the realms of recruitment advertising and marketing within the bustling metropolis of London.
Macmillan's later years were marked by a resurgence in his acting career, as he took on a diverse range of roles in various productions. One notable appearance was in the STV series "Taggart" in 1996, where he played the character of Martin Dawson. Additionally, in 1997, he appeared in Rosamunde Pilcher's "Coming Home" for Portman Productions, taking on the role of Dobson.
Notably, Macmillan's professional endeavors extend beyond the realm of acting, as he has also cultivated a passion for antiquities, with a particular focus on Scottish Pottery and Works of Art. This multifaceted individual's personal life is equally intriguing, as he met his spouse, the talented actress Morag, while they were both involved in a production of pantomime. Their union has been blessed with the arrival of three children, and the couple calls the charming town of Crieff their home.