The AFL extends its deepest sympathies to the family and friends of former Adelaide Crows player Heather Anderson, following her unexpected passing.

A much-loved and respected teammate, Heather will be greatly missed.

Heather Anderson was the first Northern Territory-based player drafted by the Adelaide Crows in 2016. The courageous defender played eight games in the 2017 NAB AFLW season, including the winning the 2017 NAB AFLW Grand Final.

AFL Head of Women's Football Nicole Livingstone said she was deeply saddened to hear of the passing of Heather and shared her condolences to the Anderson family.

"Words cannot express the deep sadness amongst the AFL and AFLW community at this time. Our sincerest condolences are to the Anderson family," Ms Livingstone said.

"On behalf of the AFL, I would like to express my deepest compassion to Heather's family, friends and colleagues."