Judith Kerr (born June 13 1923 in Berlin, Germany) is a German writer, who moved to the United Kingdom at the age of thirteen in 1936, where she has lived ever since, becoming a naturalised British citizen. She is best known for her children's books, such as When Hitler Stole Pink Rabbit, which semi-autobiographically tell the story of the rise of the Nazis in 1930s Germany from a child's perspective.

She left Germany with her parents and her brother in 1933, soon after the Nazis first came to power. They were forced to leave as her father, noted drama critic Alfred Kerr, was wanted by the Nazis. They travelled first to Switzerland and then onto France, before finally settling in the UK.

During the Second World War, Kerr worked for the Red Cross, before afterwards becoming an artist and later a television scriptwriter. It was in this latter capacity that she met her husband Nigel Kneale, also a scriptwriter, who she married in 1954. They have two children: their son Matthew Kneale is a distinguished writer himself, winning the Book of the Year prize at the prestigious Whitbread Book Awards in 2000 for the novel English Passengers. Their daughter, Tracy Kneale, works in the special effects industry, and has worked on the popular Harry Potter films.

She lives in Barnes, London.