The Brazilian, who was left without a Formula 1 seat after Brawn GP confirmed Rubens Barrichello as team-mate to Jenson Button, will be joining Stephane Ortelli in this year's edition of the 24-hour classic, driving the number 10 car.
Senna will drive for the team he tested for during the the Le Mans Series official test at Paul Ricard some two weeks ago.
Before he races at Le Mans, the 25-year-old will compete in the Catalonian and Spa-Francorchamps 1000kms events of the Le Mans Series.
The team said Olivier Panis and Nicolas Lapierre will share the No. 11 car.
Two more drivers will be announced in the near future to complete the line-up for the Le Mans 24 Hours.