NASA and Roscosmos
Russian and American astronauts will share space in the same spacecraft, following NASA and their corresponding Roscosmos in Russia.
On Friday, both Roscosmos and NASA confirmed the deal.
Two of the two distinct launches of Russia's Soyuz spacecraft are reserved for NASA astronauts, with the 1st launch scheduled for September from Russia's spaceport in Kazakhstan.
Russian astronauts will participate in a minimum of two upcoming SpaceX missions to the International Space Station.
NASA will assign cosmonaut Frank Rubio to September's Soyuz mission, and cosmonaut Loral O'Hara will participate in additional Soyuz flights.
According to NASA, Roscosmos will arrange for astronaut Anna Kikina to fly on SpaceX's September flight, and Andrei Fedyaev will travel on another SpaceX mission in spring 2023.
Roscosmos and NASA have been considering seat swaps for months as tensions rise between the United States and Russia over the Ukraine war.
Dmitry Rogozin, who was replaced as head of Roscosmos on Friday, threatened to end Russia's cooperation with the International Space Station altogether.
NASA stated on Friday that the carpooling agreement with Russia is vital to ensure the "continued safe operations" of the International Space Station.