Elon Musk's SpaceX will send astronauts to the International Space Station for the first time in May, NASA said, announcing the first crewed launch from the United States to the platform since 2011.

The tech entrepreneur's company will launch a Falcon 9 rocket to transport NASA astronauts Bob Behnken and Doug Hurley in a first for the space agency as it looks to cut costs.

The billionaire's Falcon 9 rocket will transport Nasa crew-members
The billionaire's Falcon 9 rocket will transport Nasa crew-members AFP / Brendan Smialowski

"NASA and SpaceX are currently targeting no earlier than mid-to-late May for launch," the US space agency said in a statement Wednesday.

In March, Musk's Crew Dragon capsule made a round trip to the ISS, which is in orbit more than 250 miles (400 kilometers) above Earth, with a mannequin on board, before returning to the Atlantic after six days in space.

SpaceX Dragon has made several resupply trips to the International Space Station but May's launch will be the first crewed mission
SpaceX Dragon has made several resupply trips to the International Space Station but May's launch will be the first crewed mission NASA / Handout

Since the last US space shuttle mission in 2011, after 30 years of service, only the Russians have been going back and forth to the ISS.

SpaceX has made the trip 15 times since 2012, but only to refuel the station.

It is not the only private company servicing NASA: Boeing has also won a contract and is developing its own Starliner capsule.

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