The full-back played the full 90 minutes as Wales lost their penultimate Euro 2016 qualifier 2-0 against Bosnia & Herzegovina in Zenica.
But it didn't matter as Israel, who could still potentially match Wales at start of play, lost 2-1 at home to Cyprus.
That meant a top two place and automatic qualification for next summer's finals in France - Wales' first-ever appearance in the European finals and first in a major tournament since the 1958 World Cup.
News filtered through just moments after the final whistle in Zenica, sparking celebrations from Ben and the Welsh squad.
Joining Ben in France will be our Belgian quartet Toby Alderweireld, Nacer Chadli, Mousa Dembele and Jan Vertonghen as the Red Devils went top of Group A with a 4-1 win in Andorra to join Wales in the finals.
Toby and Jan started again and completed the 90 minutes while Nacer came off the bench in the 72nd minute. Mousa has missed out through injury.