Celtic failed to reach the Champions League group stage and finished bottom of their Europa League group
Celtic have confirmed that Ronny Deila will leave the club come the end of the season.
In a statement released today on the clubs's official website, Deila said: "It was an absolute privilege to be named manager of Celtic, such a wonderful football club, and I have enjoyed my time here immensely. I will never forget the welcome I received almost two years ago at Celtic Park from so many fans. When I joined Celtic I knew I was coming to one of the world's great football clubs.
"There have been some great times and I am delighted that we have brought some trophies to the Club.
"I was delighted in my first year to bring our fans a League and Cup double and enjoy some European nights at Celtic Park, and I am pleased this season to be well in contention to win another Premiership title.
"There have been some disappointments and times when we have not achieved what we had hoped for and I'm realistic and honest enough to admit that, but I know that the players, myself and my backroom team have always given everything we had to bring success to our supporters.
"I would like to thank everyone who has supported me so well at the Club. The fans have been magnificent during the past two years."
The move comes following Celtic's defeat to Rangers in the Scottish Cup. Celtic failed to reach the Champions League group stage and finished bottom of their Europa League group this season.
They currently lead the Scottish Premiership by eight points and is aiming to deliver a fifth successive title for the club.
Deila took over for Neil Lennon when the manager left the club in 2014 and has since expressed an interest to once again manage the team.
Neil Lennon won the league with Celtic in his last season in charge. Image: Danny Lawson / PA Archive/Press Association Images
Celtic chairman Ian Bankier said: "I would like to thank Ronny for his contribution to the club and, on behalf of the Celtic Board, give him our best wishes for the future in everything he does.
"Ronny is a fine man with strong values of honesty and integrity. He has had some success, which we have enjoyed, and I know all our fans will back Ronny and the players as he looks to bring us more success in the shape of a second League title.
"We are all Celtic supporters and we all know that there can be disappointments in football, but I know Ronny is a man who has given his very best to the job and someone who will always care passionately about the club."