Porsche has confirmed that an electric car is in the works.

The iconic sports car company will begin building prototype vehicles later this year. The cars will be based on the Boxster.

The project was confirmed by Porsche CEO Michael Macht.

The all-electric car joins Porsche’s growing alternative models – which include the hybrid Cayenne and GT3 R hybrid racer. Porsche will also introduce a hybrid Panamera next year, and will likely add the hybrid 918 Spyder supercar later this year.