Brown confirmed earlier this month he would shave his head, inspired by his young cousin, Grace, who has battled leukaemia.
“Any help that all of you can give me along that journey, knowing what this girl has gone through and what my family's gone through would mean the world to me,” Brown said at the time.
“Grace had a pretty tough time of it throughout her life… when she was six, she was diagnosed with leukaemia."
The 30-year-old now has a freshly-shaven head, having cut his long locks for the cause on Saturday morning at Yarra Park.
"It's a fair bit lighter," Brown said at the event. "It's cooler too."
The transformation is the first for Brown in close to a decade, with the former North Melbourn forward revealing he hasn't cut his hair in 10 years.
At the time of Brown's shave, over $64,100 have been raised on donations.
Brown has played 32 games in two seasons with the Demons, including their drought-breaking grand final win in 2021, where he kicked three goals against the Western Bulldogs.
Brown moved from te Kangaroos at the end of the 2020 season after a dominant few years at Arden Street, where he booted 287 goals in 130 games, including three successive seasons of 60 goals or more from 2017-2019.
The Demons enjoyed a strong performance against St Kilda in their pre-season clash at Moorabbin on Friday, where Brown was among the leading goalkickers.