Heptathlon Olympic gold medallist Jessica Ennis, swimmer Rebecca Adlington and former triple jumper Jonathan Edwards tweeted:
Congratulations @mo_farah on the birth of his twins!!! Amazing news! Hope mum + babies are doing well xx
More top news
Chancellor George Osborne has announced a £500m investment for the Faslane naval base in Scotland, home of the UK's nuclear deterrent.
Five-times major winner Maria Sharapova has pulled out of the US Open tennis championships due to a leg injury.
Police are hunting for a mother who has disappeared with her 10-week-old baby.