Jackson was announced as Caretaker Manager in October 2021, before being appointed as the club’s permanent Manager in December 2021.

Jackson arrived at the club as a player on loan in February 2010, before joining permanently that summer. He played 279 games for Charlton, scoring 55 league goals and has been involved in two promotions to the Championship, as captain in 2011/12 and as Assistant Manager in 2019/20.

Despite being one of the favourites for promotion it has been a frustrating season for the Addicks and Jackson was unable to turn their season around, finishing in 13th place and 24 points off the play-offs.

Charlton Owner and CEO, Thomas Sandgaard, said: “I would like to thank Johnnie for everything he has done for the club. He is a Charlton legend who has given his all for this club as a player, captain, coach, assistant manager and manager.

“I am grateful for all he has contributed during my time at Charlton, including stabilising us this season when he took over as manager, following our poor start to the campaign.

“This decision has been a very difficult one to make, Johnnie has done so much for the club, but I felt the time was right to make the change as we continue our preparations for next season.

“Our search for a new manager has begun. This season wasn’t the season any of us at the club wanted. I have big ambitions for Charlton and it will be important for us to find the right individual that can build on the foundations in place and help us progress on our journey.”

Jackson arrived at the club as a player on loan in February 2010, before joining permanently that summer. He played 279 games for Charlton, scoring 55 league goals and has been involved in two promotions to the Championship, as captain in 2011/12 and as Assistant Manager in 2019/20.

The club would like to extend its sincere thanks to Johnnie for everything he has done for Charlton Athletic over his 12 years at The Valley and wish him all the very best in his future career.