The
2003 Six Nations Championship was the fourth series of the
Six Nations Championship. Including the previous incarnations as the Home Nations and Five Nations, this was the hundred-and-ninth series of the northern hemisphere rugby union championship. The annual tournament was won by
England, who completed a tournament
grand slam, and went on to win the
2003 Rugby World Cup later the same year. Italy won their first match with Wales (30-22), finishing in 5th place for the second time.