Last year's winner Mick Kinane features among an elite group of ex-jockeys confirmed for the third running of the John Smith's Aintree Legends Charity Race on Grand National day.
The 13-time Irish champion jockey partnered the Paul Nicholls-trained American Trilogy to win the one-mile-five-furlong contest last April and has since made it two from two in such events in a 'Legends' race at Doncaster's St Leger meeting.
Tony Dobbin, who won the 1997 Grand National aboard Lord Gyllene, claimed the first running of Aintree's charity race in 2011 and will also be be back for more in the contest that opens the National card on April 6.
The 12 participants have ridden nearly 17,000 career winners between them and the previous two runnings raised over £160,000 for the Bob Champion Cancer Trust.
Brothers Michael and Richard Hills, Kevin Darley and George Duffield all join Kinane from the Flat racing scene, while the line-up is completed by Adrian Maguire, Marcus Armytage, Jim Culloty, Hywel Davies, Jimmy Frost and Carl Llewellyn.
Champion said: "The John Smith's Aintree Legends Race has now seen two great winners with Tony Dobbin in 2011 and Mick Kinane last year.
"Once again, we have a fantastic line-up of both jumps and Flat legends. This day more than any other will always be special for me and I can't think of a more fitting way to celebrate my 1981 Grand National win or my triumph over cancer than with this race and raising much-needed funds for the Bob Champion Cancer Trust."
Richard Hills said: "I have never been to Aintree before, let alone ridden there, and I am very much looking forward to being part of such a terrific line-up of jockeys and raising money for Bob's very worthy charity."
Adrian Maguire said: "Last year Mick Kinane sneaked a win for the Flat boys so this year we shall be doing everything we can to return the trophy to its rightful home and one of us jumps boys!"
On the fund-raising front, each individual jockey can have a corporate sponsor and members of the public can sponsor the race or their favourite jockeys at www.bobchampion.org.uk and via Just Giving pages.
6 May 2016William Haggas hoping for Ascot mile high with Tutu Nguru
Ralph Beckett hoping Mountain can reach new peak in Lingfield Oaks Trial
Saeed bin Suroor seeking Winning performance from Story in Lingfield Derby Trial
2000 Guineas winner Galileo Gold to swerve Derby and be aimed at Irish Guineas
Derby hope US Army Ranger given scare by stablemate Port Douglas at Chester
Jason Maguire - Sad day but retirement wasn't a hard decision
The Queen's Dartmouth bids to build on progressive profile at Chester
Ian Fleming bonds with Greatrex in Chester heat
Straightforward for Cannock Chase in Huxley Stakes at Chester
Viren's Army out to deliver Dee victory for Richard Hannon
Charlie Hills eyeing Jersey date with Ibn Malik
5 May 2016Galileo Gold a great 'nerve settler' for expanded Hugo Palmer operation
John Gosden's So Mi Dar among Musidora entry
Ventura Storm confirmed for weekend Derrinstown Stud Derby Trial mission
Derby favourite US Army Ranger scrapes home in Chester Vase
In-form Dark Red books Royal Ascot ticket with Chester success
Tony McCoy salutes 'unbelievably tough' Jason Maguire following retirement
David Griffiths hoping Duke Of Firenze can bounce back to his best
National-winning rider Jason Maguire announces retirement from riding
Andre Fabre not expecting Proconsul debut fireworks
Carntop facing Lingfield Classic test for Ralph Beckett
Fellowes hoping Prince can reign in Newbury date
No rush for Marcus Tregoning to map out Alamode plan
Noel Fehily in 'good spirits' following Newton Abbot fall
Noel Fehily 'badly bruised' following Newton Abbot fall
Paul Nicholls considers Galway raid with Newton Abbot scorer Art Mauresque
Lingfield forced to revise Saturday card
No Heretic and Nicky Henderson crowned Cup kings at Chester
David Griffiths gives Take Cover Temple heads-up at Haydock
Ryan Moore cajoles Somehow to Cheshire Oaks verdict
Copper Knight slays Chester rivals for Hugo Palmer
Nathra in French Guineas frame
Cannock Chase returns for Sir Michael Stoute in Huxley Stakes at Chester
Aidan O'Brien hoping US Army Ranger can lead Chester charge
4 May 2016'Conscious' Noel Fehily taken to hospital after Newton Abbot fall
Willie Mullins has American dream for Nichols Canyon and Shaneshill
Singapore star Zac Spirit in the July Cup reckoning
Solow on comeback trail but Royal Ascot run still undecided
Dartmouth aiming to deliver Ormonde honours at Chester
Linguistic sights set on Dee delight for John Gosden
Ainippe team consider options following Curragh spin
Trainers and jockeys praise Newcastle all-weather surface following trials
Aidan O'Brien dominates Derrinstown Stud Derby Trial entries at Leopardstown
Irish 2,000 Guineas confirmed as target for Blue De Vega
Andre Fabre unveils Royal Ascot ambition for classy Usherette
Andre Fabre resists Royal Ascot raid with French ace Vadamos
Somehow strives to earn Aidan O'Brien Oaks call-up at Chester
Roger Varian marvels at Steve Rogers Chester Cup claims
Derby hope US Army Ranger declared for Chester Vase by Aidan O'Brien
Mark Johnston duo Lumiere and Buratino to drop in distance
3 May 2016Appeal success for Robbie Colgan and David Broad over Ballinrobe bans
Injured Tommy Dowling recuperating after operation
Lingfield Saturday card in limbo
Owen Burrows leaning towards York mission with Muntazah
Gabrial's King and Venue step off reserves bench for Chester Cup
Dante D-Day at York for John Gosden and Foundation
Robin Of Navan set to swerve Lingfield trial for France
Aidan O'Brien - US Army Ranger will learn plenty at Chester
Found finds magic touch for Mooresbridge Stakes success
Derby tilt not ruled out for Guineas runner-up Massaat
Awtaad too good for Blue De Vega in Tetrarch Stakes at the Curragh
Aidan O'Brien - Classic trials likely to be key to Minding plans
Steve Rogers drawn stall three in Chester Cup for Roger Varian
Somehow bids to continue Aidan O'Brien dominance in Cheshire Oaks
Aidan O'Brien ponders Irish 2,000 Guineas run for vanquished Air Force Blue