Hannah May Firmin,(1956) is an illustrator and printmaker.
She is now notable for illustrating the book covers of Alexander McCall Smith's The No. 1 Ladies' Detective Agency series for which she was awarded "Book Cover of the Year" at the British Book Awards 2004.
Firmin is the second daughter of Peter Firmin, co-creator with the late Oliver Postgate, of the children's television programmes Pingwings, Pogles' Wood, Noggin the Nog, Ivor the Engine, Clangers and Bagpuss. She grew up in Blean, Kent, before moving to London to attend Chelsea College of Art, and then The Royal College of Art in 1981. Since then she has worked as a freelance illustrator for books, magazines, newspapers and for advertising and design companies.