Rogic, 22, joined the Bhoys from Central Coast Mariners back in January 2013, having established himself as one of the top young players in Australian football.
However, the midfielder struggled to make an impact under Neil Lennon, as injuries and competition for places meant Rogic was often on the sidelines.
Rogic even went back to Australia in 2014, signing a loan deal with Melbourne Victory in a bid to break in to Australia's World Cup squad, and he was anonymous for Celtic last season, making no appearances at all.
Yet this season, Rogic has been simply superb, playing regularly under Ronny Deila and even notching four goals in 15 appearances, whilst impressing with his driving runs forward from midfield.
With Rogic becoming increasingly important at Celtic Park, the Australian has now looked back on his struggles with the club, and admitted to the Daily Record that he drew confidence from the success of his compatriots Mark Viduka and Scott McDonald at Celtic.
"When I first came over here it was a big move and change for me," said Rogic. "In Australia I had a lot of people helping me as I came through but when you move to the other side of the world away from that support network, having just turned 20, it’s not the easiest.
"But you just get on with it because you know what’s a stake - the chance to do what you want at a high level. It has to be worth it. It helped to know that other Aussies like Mark Viduka and Scott McDonald had come over here and been successful at this club. That gives you a bit of confidence and makes you hope to follow in their footsteps," he added.
With 35 goals in just 48 games for Celtic, Viduka established himself as a hero amongst Celtic fans before joining Leeds United in 2000, whilst McDonald hit 64 goals in 128 appearances for the Bhoys, with both Aussies proving to be big hits in Glasgow - and Rogic will now be hoping to continue his fine recent form and follow suit.