He had 51 caps for France, from 1945 to 1955, scoring 9 tries, 27 conversions, 15 penalties and 6 drop goals, 144 points on aggregate.

He won his first cap for France in a 21–9 win over the British Army at the Parc des Princes, in Paris, on 1 January 1945.

One of his most famous moments came in 1954 when Prat scored a barn-storming try against the All Blacks, which saw France win the match 3–0.

He continued to captain France to their first ever Five Nations victory, sharing the championship with Wales and England.

Having previously defeated England, Ireland and Scotland in the tournament, a win over the Welsh would have seen France capture their first Grand Slam and outright championship.

His leadership and skills laid the foundations for France to emerge fully on the international stage.