SpaceX is about to double the size of its fleet of Crew Dragon spaceships. The company is debuting a new spacecraft for a NASA launch later this month, and is building a fourth human-rated capsule that should be ready for flight early next year, a SpaceX official said Wednesday.

Sarah Walker, director of SpaceX’s Dragon mission management office, confirmed Wednesday the company is readying a fourth Crew Dragon spacecraft for an inaugural flight next year. SpaceX and NASA officials previously announced that the next NASA crew mission, known as Crew-3, scheduled for liftoff Oct. 30 will use a new vehicle.

“It’s really exciting to introduce another Crew Dragon to our fleet to support our human spaceflight manifest,” Walker said. “We’ve got another one in the production line now. It should be ready in the spring to support more human spaceflight missions.”

Today, Blue Origin announced actor William Shatner and Audrey Powers, Blue Origin’s Vice President of Mission & Flight Operations, will fly on board New Shepard NS-18. They will join crewmates Chris Boshuizen and Glen de Vries for the flight which lifts off from Launch Site One on October 12.

NASA marked a significant milestone Sept. 30 in its plans for future missions to the Moon and, eventually, Mars with completion of an RS-25 single-engine Retrofit-2 test series at Stennis Space Center near Bay St. Louis, Mississippi.

BepiColombo will complete its first of six Mercury flybys on October 1st. Some cameras will be operating so we’ll get some images. Some science, too.

Spaceship with a VASIMR engine will deliver about 60 metric tons of cargo to Mars in about 90 days.