Born in Versailles (Yvelines) on 23 March 1951,[1] Michel Aupetit grew up in Chaville et Viroflay in the western part of the Île-de-France.

[3] He further specialized in medical ethics with obtaining a DU degree in this field from the Faculty of Medicine of Créteil in 1994.

[1] Aupetit then studied for the priesthood at the seminary of Paris where he earned a Canonical Baccalaureate in Theology.

[11] On 5 September 2019, Aupetit and Rémy Heitz, the lead prosecutor in Paris, signed an accord agreeing to better cooperation which will speed up sex abuse investigations.

In November 2022, French police began an investigation with allegations that several years before, Aupetit had sexually assaulted a woman who was under legal protection as a vulnerable individual.