Coe to light up Kempton.
The fixture on Friday, April 21, will see the lights switched on for the first time at the Sunbury venue, which staged its first card on the new Polytrack surface at the weekend.
Lord Coe, who played a pivotal part in bringing the 2012 Olympic games to London, said: "I look forward to the evening and to seeing the new track.
"London and the whole of the UK will be hosting many more sporting events in the run-up to the Olympic Games and Paralympic Games in London in 2012 and it is always exciting to see a new state-of-the-art sporting venue."
Julian Thick, managing director at Kempton, said: "We are thrilled Lord Coe has agreed to turn on the lights for our first floodlit race night.
"We felt Lord Coe's involvement in the London 2012 bid would be an apt link for Kempton Park as we strive to attract the night out crowd from London and we are also trying to build a world-class sporting venue for the capital."
NSIR Peter O'Sullevan will star at the Everyman Theatre in Cheltenham this Friday in a one-off show looking back on his historic career in horseracing.
The 88-year-old, whose working life as a journalist and broadcaster began over 65 years ago, commentated on 50 Grand Nationals before his retirement in 1997.
Sir Peter, who had 58 winners in his colours, said: "I will be looking back on my career and chatting to the audience in the first half and will be quizzed by racing journalist Alan Lee.
"After the interval the audience will hopefully bombard me with questions, which I will endeavour to answer."