Nathan and Tania Buckley at the 2016 Brownlow Medal count.Credit:Pat Scala
"It has been a tough and challenging year for every family and for ours[sic] included,"Ms Buckley wrote in the caption of a picture of her and the Collingwood Magpies coach at an awards ceremony.
"It is with the utmost love and respect for each other and a true commitment to our sons that we made a decision to separate in January,"she wrote.
Ms Buckley told followers that the pair's primary focus remained on their two sons,Ayce,12,and Jett,14,as they navigated their way through the separation.
"We remain dedicated parents and in the interest of our boys,we ask for our family to be given the privacy that is needed,"she said.
"We thank everyone in advance for understanding our request and for the unconditional love and support we have received throughout our marriage."
The pair were married on December 31,2002 and settled in Toorak.