SpaceX says it will be ready to launch four pioneering space tourists into orbit in just two years.

Thanks to a partnership between the Elon Musk-owned aerospace company and space tourism company, Space Adventures, SpaceX says that its first private citizen-chartered flight around Earth could come as soon as late 2021 or early 2022. 

Space Adventures has already helped launch tourists into space, specifically the International Space Station, using Russia's Soyuz Rocket.

'This historic mission will forge a path to making spaceflight possible for all people who dream of it, and we are pleased to work with the Space Adventures' team on the mission,' SpaceX president and COO Gwynne Shotwell said in a statement.

According to Space Adventures, the mission will last about five days and would launch from Cape Canaveral in Florida. Training for the mission would take a few weeks according to the company. 

Once launched into orbit aboard SpaceX's Crew Dragon capsule - a current work-in-progress - passengers will 'free-fly' around the Earth without docking with the ISS. 

Space Adventures says that will attempt to reach two to three times the altitude of the International Space Station which orbits 250 miles away from Earth's surface.