Top golfer Rory McIlroy has told ITV News that he hopes and expects the sport's governing body to "make the right decision" tonight.
The Royal And Ancient Golf club will announce the result of a vote on whether to allow female members at St Andrews, for the first time in its 260 year history.
It is expected the all male membership will approve the move this evening and immediately enrol 15 women.
If it is approved it will mean only three major golf clubs will still have men only membership. Muirfield and Royal Troon in Scotland, and Royal St Georges in Kent.