The closeout crew has completed its hatch seal check for the Orion crew module's side hatch, which allows them to watch for any loss of pressure over time or making sure the door is completely airtight.

Engineers are focusing on conducting a full cabin leak check before moving forward with closing the second hatch on the Orion spacecraft, which is the Launch Abort System hatch.

-ABC News' Briana Alvarado

The closeout crew has now closed the side hatch, one of two hatches on the Orion crew module. The remaining hatch that the team is working to close is the Launch Abort System hatch.

This comes after the space agency confirmed that the spacesuits of all four astronauts passed their leak checks while in the Orion module, which once again tested the suits' pressure, ensuring they are airtight.

-ABC News' Briana Alvarado

With the help of their closeout crew, the Artemis II astronauts have entered the Orion crew module, which they named "Integrity."

This mission will be the first time humans travel into space on Orion.

Artemis II will be a crucial step in testing the systems on the spacecraft for future deep space missions back to the moon.

-ABC News' Briana Alvarado

The Artemis II crew has arrived at the launchpad at the Kennedy Space Center in Florida. 

NASA has said the four astronauts remain on track to launch at 6:24 p.m. ET.

Newly released photos from NASA capture the joy of the Artemis II crew after they looped around the far side of the moon

In one photo, entitled "Moon Joy," Christina Koch, Jeremy Hansen, Reid Wiseman and Victor Glover take time for a group hug inside the Orion spacecraft on April 7 as they head home.

Also seen in the photos is the plushie, "Rise," designed by a second grader who won a contest for his toy to travel with the astronauts.

At just under 200,000 miles from Earth, the Artemis II crew is closing in on the final destination of its cosmic ride.

-ABC News' Briana Alvarado