Beau is about to become the first teenager to win a world title in darts.
At the age of 10, the teenager from Doncaster started playing darts. She will be the youngest woman to compete at the championship when she faces William O'Connor.
Do you want to know more about a darts player? There are a few facts about the man.
Greaves comes into this tournament in terrific form. The Guardian reports that she has won 66 consecutive matches and eight tournament titles in a row on the PDC Women's Series. Not bad.
Several of the top male players at the World Championship, including defending champion Peter Wright, don't want to face her.
Greaves said that sometimes he forgets that he is still a teenager. I don't remember that when I am doing all this stuff.
I didn't think of it as a dream. I was happy to just play the ladies darts. I didn't think it would happen, but it did.
When she got to the third round of the World Championship, she was the first woman to do so.
She lost to Greaves at a tournament in Wigan earlier this year.
"I don't want to be compared to someone else." She did a great job, but I want to do my own thing and enjoy it.
The WDF World Championship was won by 18-year-old Greaves.
The previous youngest winner of a world championship was 21. She set a new record by winning the tournament.
One of the more apt nicknames is "Beau 'n' Arrow".
She said that the name was suggested by one of her dad's mates in Doncaster and ended up sticking.
She is still a normal teenager even though she has all her awards.
She said that sometimes you are on a high and you come back to your mom. I wouldn't want to be treated differently when I come back from a darting weekend.
The darts world has already started. She thinks she can go further.
She said that no one has seen her play how she can. I can turn it on when I need to.
Our guide will show you how to play darts.