Billionaire Jeff Bezos will go into space tomorrow if everything goes according to plan.
Bezos and his three crewmates underwent training on Sunday.
The launch site is in western Texas.
The planned trip will only be for eleven minutes.
The trip will include the oldest person ever to go to space - 82-year-old Wally Funk - and the youngest - 18-year-old Oliver Daemen.
None of the people on the craft will be astronauts.