The professional boxer who holds several titles was seen attending the protest while on crutches.
Daily Sun reported he sustained injury in a recent training session.
Wearing a boyish smile, Anthony Joshua adorned a black hoodie engraved with the words “Black Lives Matter”.
Joshua also wore on a leg brace.
Watch Anthony Joshua as he makes his voice heard during the #BlackLivesMatter protest in Watford below;
Anthony Joshua makes his voice heard at today’s Black Lives Matter protests in Watford.