The 27-year-old, who trains at Glasgow's Griphouse gym, has been signed up by the UFC (Ultimate Fighting Championship) after winning all of her first eight professional mixed martial arts (MMA) bouts.
She will now fight for the UFC's female strawweight (115lb) world title next year in a tournament that will follow a reality TV format.
A group of female fighters will live and train at the UFC's world class facilities in Las Vegas, with their exploits filmed for popular TV show The Ultimate Fighter.
Joanne said: "This is what I've been aiming for and it's great that I've made it to the UFC.
"But the hard work will be trying to stay there.
"A lot of people get one chance and don't go back. I need to make sure I arrive there as the best possible fighter I can be."
After her first three fights, Joanne was signed up by all-female fight promotion Invicta, based in Kansas City.
Her performances in America have won her an army of fans across the pond.
Impressed by her clinical striking skills in the cage and her softly-spoken demeanour outside it, fans have taken to the Scots star known as 'Jojo'.
She is the second Scot to fight for the UFC, with West Lothian's Robert Whiteford having made his debut in October.