The 47-year-old former model, singer, songwriter, ex Miss America and actress performed a number from her new Broadway musical Sondheim On Sondheim. In a proper ‘mums been at the gin again’ moment, Williams stripped down to her underwear revealing the kind of body that would make someone half her age jealous.

Careful analysis of William's physique has revealed that she clearly made a pact with the Devil at some point in her youth to maintain eternal beauty or at least maintain a slow decline. The Eraser star got down to lacy stocking on American chat legend Regis Philbins show. She certainly made us jangle our loose change in our pockets and forget why we came into the room!

See below for saucy picture. More at the Daily Mail.