Vivian Cheruiyot and Linet Masai (Ricky Simms) © Copyright
Winners of global gold medals over 5000m and 10,000m at last year's Championships in Berlin, the Kenyan duo are no strangers to the testing Holyrood Park course, where they will compete on 8 January 2011.
Cheruiyot has already made four appearances at the Edinburgh event, finishing runner-up on two occasions with a third place position also under her belt.
Masai, who has IAAF World Championship Cross Country silver and bronze medals to her credit, has an equally impressive record. She finished second in the 2008 race and clinched the title in 2009.
The 21-year-old is already in great form this winter, having won two high profile Cross Country events on the European circuit; the Cross de l'Acier and Course de l'Escade.
"The field for the women's six km race is definitely coming together with the signing of these two world class performers," said Peter Riley, the meeting's elite athletes' coordinator.
"Vivian is returning for a fifth time after a tremendous track season, where she enhanced her pedigree when winning the Commonwealth Games 5000m gold medal. Earlier she achieved even greater accolades when capturing the IAAF Continental Cup crown and overall Diamond League title over the distance. Let's not forget as a past world junior champion she is a highly successful cross country runner and has performed consistently in the annual IAAF Permit Meetings in recent years."
"Linet will be arriving in Edinburgh having already shown great cross country form this season and I've no doubt both will figure prominently again in this year's race," Riley said.
The presence of Cheruiyot and Masai will offer massive challenges to Freya Murray and Stephanie Twell, who will be leading the British challenge on home soil. Riley insists it will become even tougher.
Riley said, "I'm in negotiations to sign up several more big names for the race and hoping to reach agreement with managers and athletes in the next few days."
However Ethiopia's Olympic champion, Tirunesh Dibaba, a two-time Bupa Great Edinburgh Cross Country winner, doesn't figure in his plans. "She's still recovering from injury so will not be defending her title."
The Bupa Great Edinburgh Cross Country will be broadcast live by BBC Television. It will also feature international men's 4km and women's 6km races. The event is free for spectators, and all the action gets underway from 1pm.
Organisers for the IAAF
2006 Evergreen Mutola