Sophia Maria "Fiep" Westendorp (17 December 1916 – 3 February 2004) was a Dutch illustrator who became popular due to her long collaboration with writer Annie M.G.

Three generations of Dutch people have grown up with her illustrations.

[1] The drawings she made for Jip en Janneke, a series of stories which ran in Dutch newspaper Het Parool from 1953 to 1957, now adorn a variety of items sold by Dutch department store HEMA.

[3] Westendorp also drew a text comic based on the Annie M.G.

Since 2007, the University of Amsterdam has had an endowed chair for illustration in Westendorp's honor.