Nine free concerts will be on offer, drawing in musicians from Francophone countries who will be performing jazz, folk, rap and everything in between.
Food lovers will also be catered for with the chance to try different delicacies from around the French speaking world.
With around 70,000 spectators expected in London's most famous square, and parts of the day shown on TV5 Monde, it is sure to be a day of celebration for all things French.
And if you can't get to London but want to mark the Fête de la Francophonie, it officially takes place on March 20 and you can check out the official website for events taking place around the world.
Related article: Online French language resources