Royal, who is also a former partner of French President Francois Hollande, will be responsible for the environment, sustainable development and energy.
The expanded ministry had been offered to the Green Party, who declined to participate in the new administration, news site France 24 reported.
Observers have speculated that Valls' new pro-business administration could look to change gears in a number of areas to boost France's economy, including shale gas.
During
