The Paris Olympics start on Friday with the opening ceremony, marking the first time in 100 years that Paris is hosting the summer Games.
Most events will be in or around famous parts of the city. During the opening ceremony, boats will carry athletes and important guests along 6km of the River Seine.
About 300,000 people can watch. Not much is known about the event, but there are rumours that Celine Dion and Lady Gaga might perform.
Thomas Jolly, the ceremony’s artistic director, said he wants to “show France in all its diversity.”
This Olympics is special because it has equal numbers of male and female athletes, as there will be 5,250 men and 5,250 women competing.
Paris is getting ready for millions of visitors. President Emmanuel Macron said they are “Ready and will be ready throughout the Games.” However, some people in Paris are worried about crowds, higher prices, and travel problems.
Security is very tight with up to 5,000 police, soldiers, and guards on duty. Parts of the Seine are fenced off for the opening ceremony.
Residents need QR codes to enter some areas, while local businesses are unhappy about this, but officials say the fences will be gone after the event.
The cost of the Games is about 9 billion euros (£7.6bn). The organizing committee promises it will be the greenest Olympics ever.
Only two arenas are new: an aquatics centre and a place for badminton and rhythmic gymnastics.
Other events will be at famous places like the Stade de France, Roland Garros, the Grand Palais, and the Place de la Concorde.
There were worries about the water quality in the Seine, where swimming events will happen. Swimming in the river was banned for a long time because the water was dirty.
In June, tests still showed high levels of E.coli, but on July 17, Paris mayor Anne Hidalgo swam in the river to show it is safe. The water will be tested regularly before the events.
