Many people take on thrills for charity, but the Hospice of St Francis are asking men to don frills instead.
Dame For A Laugh – now in its second year – wants men to wear dresses and walk or run a 2.5 mile course.
Camelot Rugby Club and Hemel Hempstead MP Mike Penning are already signed-up.
Registration costs £15 and the event takes place on Sunday, April 28, at Camelot Rugby Club, Hemel Hempstead.
Sign up online at www.stfrancis.org.uk/Dame or call 01442 869555.