* Gaspar Noé as Jean
* Joseph Conforti as Julien
* Raphaël Fejtö as Alain
* Maxence Perrin as Boniface
* André Dussollier as Father Jean
* Claire Nadeau as Madame Rossignol
* Serge Merlin as the German Officer
* François Cluzet as the Gestapo Agent
It's worth noting that "Au revoir les enfants" (released in 1987, not 2007) is a different film altogether, directed by Louis Malle. It also has a distinct cast including:
* Gaspard Manesse as Julien Quentin
* Raphaël Roman as Jean Bonnet
* François Cluzet as the Headmaster
* Birgit Doll as Madame Rossignol
* Didier Pain as the German Officer
The film you might be thinking of is likely "Au revoir les enfants", as it's a much more famous and acclaimed film than "Au revoir et bonne chance".