About William Gallas
William Eric Gallas is a French football coach and former professional footballer who played as a defender. He played most of his footballing career in France and England before finishing his career in Australia with A-League club Perth Glory. Gallas is currently a youth team coach at Hungarian club Zalaegerszegi TE. It was with Chelsea and under Ranieri where Gallas obtained his first international cap for France. Gallas was part of the Chelsea squad which won back-to-back Premier League titles and a League Cup under Ranieri's successor José Mourinho. Chelsea, however, did not agree to a transfer request by the player in May 2006, as they considered Gallas an important first-team member. He made his debut in the UEFA Champions League for Marseille, scoring his first goal in European competition in a 1–0 win over then European champions Manchester United at the Stade Vélodrome in October 1999.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.