Barry McGuigan and Lawrie Sanchez are the latest big names to sign up for the Sport Relief Belfast mile on 15 July.
Barry McGuigan is backing Sport Relief
The ex-boxer and Northern Ireland manager will join a diverse cast of runners ranging from actor Jamie Dornan to BBC personality Jackie Fullerton.
The Belfast mile will be one of the 15 flagship events being held across the UK on the big day.
The event starts from Custom House Square, Belfast from 11am and there will live coverage on BBC One.
Armagh City is also doings it bit for Sport Relief with a mile event taking place in the Cathedral City on Saturday morning.
The Armagh event kicks off at 1030 BST from the Mall.
Various other fun activities have been arranged for the participants to enjoy. More information can be obtained by ringing 028 37526869.
The votes are also continuing to fly in on the big question of whether Stephen Nolan or Gerry Anderson should do the Belfast mile.
Listeners and viewers still have time to vote on which of the BBC presenters should have to dust off their old tracksuit and trainers for Saturday's event.
The two broadcasters who present back-to-back shows on BBC Radio Ulster - and usually have plenty to say to each other - have put their fate in the hands of their listeners.
To vote, listeners can log on to Gerry's or Stephen's websites and select who they want to see take part in the mile. Whoever gets most votes will have to do the mile.
Stephen and Gerry get their gear ready for 15 July
Listeners can vote online from now until the end of June by clicking the following link:
Both sites will have a 'Mile-ometre' to gauge who is setting the pace with the most votes and both presenters will have regular updates on their morning programmes on BBC Radio Ulster and BBC Radio Foyle.
Other confirmed runners include X Factor contestant Philip Magee, motorsport stars Kris Meeke and Colin Turkington, boxer Brian Magee and athlete Zoe Brown.
BBC honour will also be upheld by Christine Bleakley, Mark Sidebottom, John Daly, Austin O'Callaghan, Noel Thompson, Jim Fitzpatrick and David O'Reilly.
There will also be a five-hour TV special on BBC ONE - Sport Relief Saturday - hosted by Gary Lineker, Chris Evans and Davina McCall.
Local people can still register to run the Sainbury's Sport Relief Mile on July 15 by visiting bbc.co.uk/sport or www.sportrelief.com or call 0845 605 8000 to find out how to get involved or to organise their own Sport Relief Mile event.