The contested bull made a heartwarming return to the football field in Round 22 against Adelaide after recovering from testicular cancer, collecting 17 disposals in his return.
Selected with Pick 5 in the 2009 National Draft, Cunnington has played 229 games for the Kangaroos and has become one of the best-contested midfielders in the competition.
The 31-year-old will continue playing in the royal blue and white under newly appointed head coach Alastair Clarkson for the next two seasons and will be looking forward to getting a full preseason heading into 2023.
"Our players stand taller when they're around him and after watching the journey he's been on over the past 12 months, our members and supporters' connection to him is as strong as ever.
"Ben's commitment to the club over many years speaks to his loyalty as a player and person. He is as committed to us as we are to him, so we are delighted."