The 31 - year - old is an integral part of Ange Postecoglou 's Socceroos squad .
If the national team does qualify for the 2018 World Cup in Russia , squad will be likely be Milligan 's fourth World Cup .
The 31 - year - old is an integral part of Ange Postecoglou 's Socceroos squad and if the national team does qualify for the 2018 World Cup in Russia , it will be likely be Milligan 's fourth World Cup .