Over a thousand women are expected to take part in a 10km walk around Birmingham city centre from midnight on Saturday 17 September in aid of local charity Acorns.
Registration for the Acorns Midnight Walk is inside Town Hall from 9.30pm.
BRMB presenters Jo and Sparky will be leading warm-ups and entertainment in Victoria Square before participants line up to start the walk at the stroke of midnight.
The walking route will take in the familiar city landmarks of Bullring, the Jewellery Quarter, St Philip’s Cathedral and Brindleyplace by moonlight.
Last year’s Acorns Midnight Walk event raised over Â£100,000.
The Wythall-based Acorns Childrens Hospice works with life limited and life threatened children and their families across the Heart of England.