I doubt if they would have been chosen to light the cauldron, but she is an international figure, and he a celebrity boxer, so there is nothing wrong in inviting them along to the opening ceremony, but according to the report neither of them will be going along.
At the Chinese Olympics;
/// The flame was carried into the stadium by Greek rowing world champion Christina Giazitzidou, and given to Greek weightlifter Pyrros Dimas and Chinese gymnast Li Ning, who lit the cauldron at the 2008 Beijing Games.///
Who should we choose for these honours?