Part 1

Sport Relief is back, bigger than ever and like it has never been seen before. For the first time ever, the event is hosted live from the Queen Elizabeth Olympic Park by some of the best-loved names in sport and entertainment in a huge celebration to try and raise a record amount for good causes at home and abroad.

John Bishop and Sebastian Coe captain two teams of celebrities in a unique sporting competition across events at the Velodrome and Aquatics Centre. The 2012 Olympic spirit is recaptured with over 9,000 fans packed in the venues to watch the celebrities compete in events such as rhythmic gymnastics, elimination cycling and synchronised swimming.

There is also a look at how the money raised for Sport Relief is spent helping disadvantaged people both in the UK and in other parts of the world.

7pm-8.30pm

Gary Lineker and David Walliams kick off the big night from 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.

8.30pm-10pm

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.