Watch: SpaceX Crew Dragon Capsule Arrives At The International Space Station

Four astronauts sent into space on a SpaceX capsule on Sunday night are now on the International Space Station.

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The Crew Dragon Resilience arrive at the ISS on Monday night and the hatch officially opened at 12:02 a.m.

The crew had been on their spacecraft for more than 30 hours. The four astronauts have joined three others who were already aboard the space station.

Related Story: Watch: SpaceX Crew Dragon Capsule Chases Down International Space Station

Their arrival marks the first time a private company sent a full crew to the ISS.