Margreet de Heer lives and works in Amsterdam, The Netherlands, with her husband Yiri T. Kohl and two cats. A long time ago, Margreet studied Theology at the University of Amsterdam, but through divine intervention she ended up being a comic artist. She worked at the famous comic store Lambiek from 2000 until 2005, and wrote a book about Dutch comics together with Kees Kousemaker.
Since 2005, the same year she contributed to the 24 Hour Comic Day Anthology, she is a full-time comic artist producing a wide range of work, from children's comics in magazines to cartoons at business conferences.
In 2007 she started making philosophical comic "reports" for newspaper Trouw. This resulted in a book edition in 2010 which was published in the US by NBM Publishing with the title 'Philosophy: a Discovery in Comics' in 2012.
Margreet continued the series with a comic book about religion in 2011, followed by one about science in 2012. The latter was published in the US with the title 'Science: a Discovery in Comics', in September 2013. 'Religion: a Discovery in Comics' appeared in October 2015. Another part of the series, about World Domination, has appeared in Dutch in 2015. The fifth book, 'Love: a Discovery in Comics' was published at NBM in 2019.
In 2017, Margreet was elected Comic Artist Laureate of The Netherlands, which is an ambassadorship for Dutch Comics. She is especially devoted to bringing comics to the classroom.