Belgian singer and songwriter, born in Brussels on 1952-08-01. Co-founder of [l65574]. He has also made some records & written texts under the moniker of Hagen Dierks but Duvall is perhaps most famous as the lyricist for (a.o.) Marie-France, Lio, Telex, Alain Chamfort, Jane Birkin, Dani, Elsa, Etienne Daho, Jeff Bodart, Marka, Charline Rose, Enzo Enzo, Marc Lavoine, ... Often with music by Jay Alanski. His first song published was Little Sister which he sent by mail to the Runaways in 1977.