Dider Cassegrain studied animation at the École de Gobelins, after which he cooperated on some TV series for France Animation. He was employed by the Disney Studios in Montreuil, where he worked for one year. He then joined the Story company, where he met Fred Blanchard and Olivier Vatine. They pushed him to do a comic album, and with Blanchard as a co-artist and Vatine and Pecqueur as scenarists, Cassegrain made his comics debut with the series 'Tâo Bâng' at Delcourt. His main activity remained animation however, and Cassegrain joined the Gangster studios. There, he cooperated on series like 'Calamity Jane' and 'Arsène Lupin'.