Even if you are not taking part in one of the Fitness First Sport Relief Mile events on Saturday, you can still make a difference.
Simply pick up the phone and donate some cash.
The BT-enabled Sport Relief donation line was launched this week and donations can now be made on 08457 910 910.
Those wanting to donate can also do so in person at and high street bank and most building societies and Post Offices, quoting FREEPAY account 6777.
You can also send cheques, made payable to Sport Relief '04, to: Ernst & Young, PO Box 678, London, EC4A 1NT.
Or you can donate online by visiting the official Sport Relief website at www.sportrelief.com.
Your money will help change the lives of some of the poorest and most disadvantaged people in the UK and around the world.
At the peak of Sport Relief 2002, BT's voluntary call centre staff across the UK handled more than 5,400 calls per minute, which helped raise over £14.4m to tackle poverty worldwide.
In the time it took Roger Bannister to run his record-breaking sub-four minute mile 50 years ago, 21,500 donation calls were made.
Pirates of the Caribbean actress Keira Knightley helped launch the official donation line.
She said: "Let your fingers do the walking. Call the Sport Relief donation line number and donate what you can.
"Every penny really can help to change people's lives."
Beth Courtier, head of charity programmes for BT, added: "With thousands of volunteers in 50 call centres providing 3,185 lines, BT expects to break Sport Relief's record and handle over 350,000 calls on the night."
As well as the Fitness First Sport Relief Miles taking place all across the UK on Sport Relief Saturday, BBC One will be hosting five hours of top TV on the night.
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