Australia’s darling of the turf, Winx (Street Cry), lost her I Am Invincible foal overnight.

“There are so many people involved in the Winx story from owners, staff past and present, to her many fans around the world,” former trainer Chris Waller said in a statement.

“Our thoughts and attention at the moment are on Winx ensuring that she remains healthy, as anyone in this situation would respect.

“It is a traumatic time for a mother and those involved and Winx is now the centre of our attention following the loss of a beautiful filly this morning.

“We wish to thank everyone for their support and understanding.”

Winx won 37 races on the track, including 25 Group One victories, a record four Gr.1 Cox Plates (2040m), and more than A$26 million in prizemoney.