David Tennant will be one of many celebrities making a contribution to the Sport Relief TV extravaganza which airs from 7pm GMT on BBC One and BBC Two tonight. Although unable to appear on the live show this year due to filming commitments, David will appear in a harrowing appeal video that will be shown during the course of the show.
David made a trip to Sierra Leone late last year to see for himself why the campaign is needed and how the money raised by Sport Relief can go to changing people's lives. He witnessed families and even children as young as ten who spend their days sifting through the rubbish on a dump to find things to sell on to make enough money to live on. He also visited the YMCA Kissy Primary School, set up to support children living in poverty and learnt about the way that Sport Relief promotes and supports healthcare in the region.
You can read David's Sierra Leone diary here
The Sport Relief appeal show sees familiar faces from the worlds of sport, entertainment and music joining forces for an evening that aims to raise as much money as possible for good causes in the UK and abroad. This year's show comes live from the Queen Elizabeth Olympic Park.
Sport Relief 2014
Gary Lineker and David Walliams kick off the big night from The Copper Box with Clare Balding and Gabby Logan at the Velodrome and Aquatics Centre, while Little Mix perform the Sport Relief single Word Up live.
There is a very unlikely star to warm up the nation for Sport Relief and it is the first event in Sport Relief's Clash of the Titans with the men's cycling elimination race featuring John Bishop, Patrick Kielty, Freddie Flintoff, Olly Murs, Richard Bacon and Greg James. The One Show's Alex Jones is also live in the studio for her first major interview since her extraordinary Sport Relief Challenge in Utah.
Tess Daly hosts Strictly Come Dancing with the Paralympians and a very special performance featuring Martine Wright, Nathan Stephens, Hannah Cockroft and David Clarke. Look out for a surprise judge joining the Strictly regulars too.
Davina McCall makes a triumphant entrance to join David Walliams and Gary Lineker as part of the presenting team and relives her astonishing Sport Relief challenge across the UK. And for the first time on television for years, Kylie Minogue stars in a duet of Especially For You alongside a surprise performer, while in Clash of the Titans it is over to the Aquatics Centre for the synchronised swimming with Patrick Kielty taking on Greg James.
The moment the nation has waited 11 years for has arrived - Only Fools and Horses returns with David Jason, Nicholas Lyndhurst and David Beckham. Gary Barlow and Gary Lineker join forces for the first exclusive showing of the official England 2014 FIFA World Cup song along with some of the country's leading music stars and footballing legends.
Boyzone perform live in the studio and back at the Velodrome it's the eagerly-anticipated mixed rhythmic gymnastics with an all-star cast.
10.00 - 10.35pm
All change, with Claudia Winkleman and king of comedy Jack Whitehall taking over as hosts at the Queen Elizabeth Olympic Park as the fundraising marathon goes on.
There is a special behind the scenes look at Only Fools and Horses, plus back on our screens after the award-winning Twenty Twelve, Hugh Bonneville's Ian Fletcher talks us through his new role as head of BBC balues in new comedy series W1A. The drama also continues in the velodrome with Olympic champions Amy Williams and Nicola Adams, and Helen Skelton and Sally Phillips battle it out in the women's cycling time trial.
Wimbledon champion Andy Murray is game for a laugh with the stars of Mock the Week, while Kylie Minogue performs live from the Copper Box. The Clash of the Titans reaches an exciting finale with the stars competing in the final event, the swimming relay, live from the Aquatics Centre and Jack Whitehall takes on his biggest challenge.
Gary Lineker is back alongside Fearne Cotton for the final part of Sport Relief 2014 and there is plenty to keep you up late with football managers telling jokes, out-takes and a live chat with the Clash of the Titans teams from the Copper Box.