Tom Baker described his character of Donald MacDonald as "a combination of an old George Clooney with a touch of the ghost of Hamlet's father and a bit of Vanessa Feltz".
Tom Baker claimed he had never seen Monarch of the Glen before being cast and didn't read other people's parts of the script, therefore he didn't quite know what was going on. He said "in that sense it's very like life".
Two actresses had to quit "Monarch of the Glen" due to pregnancy. Lorraine Pilkington (Katrina Finlay) starred in series 1-2 but missed out on 3. Simone Lahbib (Isobel Anderson) starred in series 6 but missed out on 7.
Kirstin Smith rejected a part in "Monarch of the Glen" (presumably Amy MacDonald) because filming clashed with her university exams.