Williams, who will be embarking on her third expedition, and Cassada, on his first, were assigned to the mission in August 2018.
Jeanette Epps is set to make history as the first Black woman to live and work on the International Space Station for a long duration mission.
Separately Tuesday, NASA named astronaut Jeanette Epps to the Starliner's first operational mission.More news: Leaked Video of LG Wing Reveals Rotating Dual Screens
Based on NASA's current schedule, the first Black male astronaut to live and work on the ISS is likely to be Victor Glover, who is set to board the SpaceX Crew-1 mission on october 23.
Epps was selected as a member of the 2009 astronaut class after earning her doctorate in aerospace engineering and working for the Central Intelligence Agency.
The journey will be the first crewed operational flight of Boeing's Starliner. "We're looking forward to getting to know her just as well as we progress toward this flight". Alongside SpaceX's Crew Dragon, that spacecraft represents part of Nasa's hopes for sending its astronauts to the International Space Station and beyond in the future, though it has run into high-profile problems during its testing. At the time, NASA did not give a reason as to why Epps was taken off the team.
Boeing's first Starliner flight in December was marred by two critical software glitches that curtailed the demonstration to only 48 hours.More news: Watch "Call of Duty: Black Ops Cold War" Trailer
At the time, NASA administrator Jim Bridenstine said that if there had been an astronaut on board the capsule it would probably have been able to dock with the ISS, as they would have been trained to correct the error that caused the early thruster burns.
NASA astronaut Jeanette Epps may finally be traveling to space.
Boeing is eager for another shot at proving its crew capsule after technical failures put the aerospace juggernaut behind Elon Musk's rocket company SpaceX, which successfully returned its rival crew capsule from the ISS earlier this month.More news: US President Donald Trump again calls coronavirus as 'China Virus'