Cœurs Vaillants (Brave Hearts), known later as J2 Jeunes and Formule 1, was a Catholic French language weekly newspaper for French children. Founded in 1929 by l'Union des œuvres catholiques de France (The Union of Catholic Works of France; UOCF), the weekly newspaper targeted readers aged 11 to 14 to become part of l'Action catholique des enfants (The Catholic Action for Children; ACE). The newspaper is notable for introducing The Adventures of Tintin to France, as well as Sylvain et Sylvette, the comics of Marijac, and of Cabu.