Denis-Pierre was born in France. Very early he geared his work towards children and YA. During a book show, Filippi asked Tiburce Oger, author of Gorn, to read one of his tale. Oger et Filippi then created Orull, published by Delcourt.
Later, Filippi joined Boiscommun on the Book of Jack then the Book of Sam, 2 stories from the trilogy Halloween Tales.
Since then, Denis-Pierre has worked on John Lord, Muse (with Terry Dodson), Marshals and Gregory & The Gargoyles, all published by Humanoids.