In short:
A SpaceX capsule has delivered four astronauts to the International Space Station in a NASA crew-swap mission that will allow stranded US astronauts Butch Wilmore and Suni Williams to return home.
After 29 hours, SpaceX's Dragon shuttle docked to the ISS after a delicate operation to accurately navigate its crew through orbit.
What's next?
Mr Wilmore and Ms Williams are expected to hand over their ISS duties to the SpaceX crew before returning home on Wednesday.
A SpaceX capsule has delivered four astronauts to the International Space Station in a NASA crew-swap mission that will allow a pair of stranded US astronauts — Butch Wilmore and Suni Williams — to return home after nine months in orbit.
About 29 hours since launching on Friday local time from NASA's Kennedy Space Center in Florida, the Crew-10 astronauts' SpaceX Crew Dragon capsule docked to the ISS at 12:04am ET (2:04pm AEST) on Sunday.
The four newcomers — representing the US, Japan and Russia — will spend the next few days learning the station’s ins and outs from Mr Wilmore and Ms Williams.
The SpaceX crew of the Falcon 9 Dragon shuttle has been welcomed onboard the International Space Station with hugs and warm embraces. (AP: NASA)
They were welcomed by the station's seven-member crew, which includes Mr Wilmore and Ms Williams — veteran NASA astronauts and retired Navy test pilots who have remained on the station after problems with Boeing's BA.N Starliner capsule forced NASA to bring it back empty.
Mr Wilmore swung open the space station's hatch and then rang the ship's bell as the new arrivals floated in one by one and were greeted with hugs and handshakes.
“It was a wonderful day. Great to see our friends arrive,” Ms Williams told Mission Control on Earth.
The SpaceX Dragon shuttle had to navigate a delicate trajectory to docking with the ISS, which included a 'soft capture' lock using its nose hatch. (AP: NASA)
Otherwise a routine crew rotation flight, the Crew-10 mission is a long-awaited first step to bring Mr Wilmore and Ms Williams back to Earth as part of a plan set by NASA last year that has been given greater urgency by US President Donald Trump since he took office in January.
Mr Wilmore and Ms Williams are scheduled to depart the ISS on Wednesday as early as 4am ET (6pm AEST), along with NASA astronaut Nick Hague and Russian cosmonaut Aleksandr Gorbunov.
Mr Hague and Mr Gorbunov flew to the ISS in September on a Crew Dragon craft with two empty seats for Mr Wilmore and Ms Williams, and that craft has been attached to the station since.
The Dragon crew had to navigate their shuttle to align with the ISS's docking mechanism, guided by a series of flashing lights. (AP: NASA)
The Crew-10 crew, scheduled to stay on the station for roughly six months, includes NASA astronauts Anne McClain and Nichole Ayers, Japanese astronaut Takuya Onishi and Russian cosmonaut Kirill Peskov.
The crew-swap mission became entangled in politics as President Trump and his adviser Elon Musk, who is also SpaceX's CEO, urged a quicker Crew-10 launch.
The duo claimed, without evidence, that Mr Trump's predecessor Joe Biden had abandoned Mr Wilmore and Ms Williams on the station for political reasons.
After docking with the ISS, the crew onboard the Dragon and the astronauts on the station had to safely pressurise the shuttle. (AP: NASA)
Having seen their mission turn into a normal NASA rotation to the ISS, the two astronauts have been doing scientific research and conducting routine maintenance with the other five astronauts.
Ms Williams told reporters this month that she was looking forward to returning home to see her two dogs and family.
"It's been a roller coaster for them, probably a little bit more so than for us," she said.
You can take a look back at how the SpaceX docking to the International Space Station unfolded in our blog below.
Live Moment
Look back at how ABC readers and other Australians responded to this live moment.
That's all from us!
That'll cap off our live coverage of the SpaceX Dragon crew's mission to dock to the International Space Station.
By all accounts from the NASA and SpaceX ground control crews on Earth, the mission has so far happened without issue.
US astronauts Butch Wilmore and Suni Williams, who have been stranded on the ISS since June last year, are now expected to return home to Earth by Wednesday.
You'll be able to watch back and read all of the key moments in our article above, and via our main ABC News home page.
Thanks for joining us!
The SpaceX crew is now floating alongside the International Space Station astronauts, and are holding a formal welcome ceremony to handover responsibilities.
Each of the SpaceX Dragon crew members have offered their thanks to their friends, families and the ground control teams on Earth.
Commander Anne C McClain said the standout for the Dragon crew was seeing the ISS float towards them while in orbit.
"Crew 10 had had a great journey up here," Ms McClain said.
"I cannot tell you the immense joy of our crew when we looked out the window and we saw the space station for the first time.
"Let me tell you, that is such an amazing journey. You can hardly even put it into words."
The SpaceX Falcon 9 Dragon shuttle crew has officially boarded the International Space Station on their mission to relive US astronauts Butch Wilmore and Suni Williams from their service on the ISS.
The Dragon shuttle's hatch door was officially opened at 3:35pm AEST, as confirmed by NASA ground control in Dallas, Texas.
The shuttle crew then floated through each hatch door and into the ISS at precisely 3:45pm AEST.
Bells have been rung to welcome the new astronauts to the ISS, followed by plenty of hugs, smiles and a lot of excitement.
Japanese astronaut Takuya Onishi was first to float through the hatch, followed by Russia's Kirill Peskov, the US's Nichole Ayers and finally the Dragon's commander Anne C McClain.
Reuters