SpaceX is set to test launch its first heavy-lift orbital rocket, the Falcon Heavy.
The new rocket will have three boosters and 27 engines designed to give the rocket 5 million pounds of thrust.
Founder Elon Musk has placed his red Tesla Roadster on board with a dummy in a spacesuit in the driver's seat.
The launch is expected to be quite the spectacle as thousands of spectators, journalists and celebs are flocking to Cape Canaveral to see the big launch.
Yahoo Finance reports that Musk says this launch has been extremely well prepared for.
Musk told reporters Monday his company has done everything possible to maximize success and he's at peace at whatever happens. He's had plenty of experience with rocket accidents, from his original Falcon 1 test flights to his follow-up Falcon 9s, one of which exploded on a nearby pad during a 2016 ignition test.
While it will be "a really huge downer if it blows up," Musk said, the hope is that any failure comes far enough into the Heavy's flight "so we at least learn as much as possible along the way."
If everything goes to plan, Musk says hes already making plans for a bigger, better rocket that can carry actual astronauts as well as materials to build a camp on the moon, asteroids and build the city he wants on Mars.