Mouldy trainers are getting cleaned and dodgy knees will click across the county as fundraisers come out in force for the Sport Relief Mile. Before all that is a night of entertainment on TV, featuring a high-profile marathon through Kent.

It is that time of year when celebrities destroy themselves on outrageous physical challenges, make a fool of themselves on the dance floor and implore viewers to give money for their discomfort.

Sport Relief weekend is the culmination of weeks of this kind of endurance, friendly humiliation and goodwill. It begins with a night of TV and then people across the county will join in the fundraising spirit at Sport Relief miles around Kent.

TV favourites Gary Lineker, Davina McCall, Dermot O’Leary, Claudia Winkleman, Fearne Cotton and Patrick Kielty present the Friday night extravaganza on the box.

Among the shows featured are Miranda, Outnumbered, Strictly Come Dancing, Britain’s Got Talent and Twenty Twelve, with many surprises in store and a host of guests from the worlds of sport and entertainment.

David Walliams, Helen Skelton and John Bishop, who have all taken on epic challenges, will be live in the studio on the night as we hear more of what they went through in the name of Sport Relief.

John Bishop’s “week of hell” saw the Liverpudlian comedian spend three days jogging through Kent as he cycled, rowed and ran from Paris to London.

Viewers can also see their favourite panel shows on Friday night, with the likes of Celebrity Juice, QI, Mock The Week, Never Mind The Buzzcocks, 8 out of 10 Cats and A Question of Sport keeping the donations rolling in.

All night there will also be powerful reminders of the serious side of Sport Relief, with moving appeal films from some of the biggest names in television.

They will report back on how the money raised changes lives, both here in the UK and across the world’s poorest countries.

There is still time to sign up to the Sainsbury’s Sport Relief Mile.

Taking place on Sunday, March 25, the mile is an affordable family day out as well as a way of raising cash for charity. Popular miles like the one at Maidstone’s Mote Park are sold out but there are races across the county, varying in length from one, three or six miles. It means there are distances for those who just want to take part and those who want to race their mates or test themselves against the clock.

Action from the miles around the country will be shown in the Mile Show on BBC1 on Sunday, March 25, at 1pm. Matt Baker and Alex Jones from The One Show and John Inverdale will round up the fundraising feats.

More than one million people of all ages and abilities will be doing the mile over the Sport Relief weekend.

10 Sainsbury’s Sport Relief Miles in Kent

(You can choose your own distance – one, three or six miles)

» The East Malling Partnership Mile from the St. James Centre, Chapman Way

» The Weald Mile from Weald Sports Centre, Angley Road, Cranbrook

» The Bewl Mile from Bewl Water, Bewl Bridge Lane, Lamberhurst.

» The Active Canterbury Mile from The University of Kent, Sports Pavilion, Park Wood Road

» The Sandwich Leisure Smile Mile from Sandwich Leisure Park, Woodnesborough Road

» The Ashford Leisure Trust Mile from The Julie Rose Stadium, Willesborough Road, Kennington

» The Folkestone Mile from The Grand, The Leas

» The Gravesham Mile, Gordon Promenade, The River Front

» The Dartford Harriers Mile, Dartford Harriers AC, Central Park, Cranford Road

» The Holcombe Mile, Holcombe Hockey Club, Holcombe Park, Marconi Way, off City Way, Rochester

To sign up and for more Sport Relief miles in the county, visitwww.sportrelief.com

Sport Relief 2012 is on BBC1 on Friday, March 23, from 7pm to 1.30am. The Mile Show is on BBC1 on Sunday, March 25, from 1pm.