FORMER Oldham Athletic head coach Harry Kewell is set to join Celtic boss Ange Postecoglou's backroom team.

Kewell, 43, has been out of work since being sacked by side Barnet last year after just four months in charge of the National League side, who he joined three months after his seven-month spell at Boundary Park came to an end.

Postecoglou had initially decided against adding to his coaching set-up initially and was assisted by John Kennedy, while Stephen McManus, Gavin Strachan and Stevie Woods made up the backroom team.

However, after clinching the Scottish Premiership title and League Cup in his first season, Postecoglou has turned to the former Liverpool and Leeds attacker, who will join Celtic as a first-team coach.

Kewell just missed out on working under Postecoglou for the Australian national side and also Melbourne Victoria but previously revealed a key piece of advice from the 56-year-old.

"The one thing Ange told me, and this has stuck with me, is go your own way," he said.

Speaking when Postecoglou was appointed at Celtic, Kewell said: "First and foremost he's a fantastic guy. It's fantastic news they've gone for an Australian.

"He has his own ideas, he won't be tempted to play any other way and I'm sure he will definitely be challenging.

"Ange will bring something different."

A year ago Celtic looked to the relatively unknown Ange Postecoglou to revitalise a club in turmoil and he silenced doubters by winning the Scottish Premiership title and League Cup during his debut season.

Postecoglou's start to life at Parkhead did not get off to the best of starts, failing to win his first three matches which resulted in a Champions League exit and an opening-day defeat to Hearts in the league.

However, the Australian always insisted he would not waiver from his footballing philosophy of attacking, entertaining and relentless football, and piece by piece he rebuilt a struggling side who were blown aside by Rangers the previous season.

The title win came at Tannadice on a Wednesday night in May, with the manager promising this was only the beginning for him and his emerging talent at Celtic.

"I've had a lot of success but this is definitely the hardest challenge and the hardest year I've ever had," said the former Australian manager as he reflected on 365 days in charge.

"I did an interview after the game and I couldn't put into words exactly what was the strongest emotion.

"I think looking back now and the way we finished off in the last game, I think there was a part of me that said, 'no, I don't want this to be the full stop'.

"This season was about building the first foundation of a team that I hope will be competing and be successful in the Premiership for the next few years."