This is a remake of the 1998 - 2001 series by the same name, which was based on the 1986 movie, which was based on the book by Jill Murphy
Mildred's cat is played by 2 different cats. One has white and grey fur and one is light grey with darker grey stripes.
If you listen closely, the song "Locked out of Heaven" by Bruno Mars can be heard softly playing in the background of every episode
The sashes represent houses. Mildred wears a red sash. Enid, Maud, and Drusilla wear yellow sashes. Ethel and Esmerelda wear purple sashes. The head of each year has special embroidery on their sashes.