Extremely mild spoilers forAvengers: Endgame ahead.

Avengers: Endgame has officially hit theaters, which means the many cast members who've spent months holding back spoilers can finally take a relaxing breath.

Since fans around the world began filling theaters to see their beloved Marvel characters assemble for one last time, cast members have started reflecting on the filming process by sharing emotional tributes, as well as behind-the-scenes photos and video from set.

Chris Pratt recently posted an especially captivating video of the cast preparing to film the final battle sequence in Endgame. Seeing the actors together on the dirt-covered set while wearing their regular clothes is quite a sight.

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"I remember being blown away in this moment on the Avengers set. Nobody was allowed to film anything on their phones. I said screw it. No rule was going to stop me from seizing this once in a lifetime opportunity to capture this collection of stars, a group that likely will never be in the same room again," Pratt captioned his Instagram post. "We are so blessed."

Aside from Pratt himself, you can see Chris Evans, Chris Hemsworth, Sebastian Stan, Mark Ruffalo, Paul Rudd, Chadwick Boseman, Danai Gurira, Tom Holland, Robert Downey Jr, Elizabeth Olsen, Jeremy Renner, Dave Bautista and more prepping to film.

After Pratt panned his camera around the celebrity-packed room, he focused the shot on Sean Gunn, who plays the on-set Rocket. Well aware of the iconic actors in his presence, Gunn joked, "I'm pretty sure I'm most famous person here."

"This is a really illegal video," Pratt said to the camera before Evans came into the shot to let him know he'd be in "big trouble."

Pratt also shared a throwback photo and seems to have inspired some of his fellow cast members to dig into their archives and share their own nostalgic footage.

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In response to Pratt's video, Evans tweeted that he "may or may not have stolen a few cool videos" as well, so here's hoping he shares them soon.

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We're still not ready to say goodbye, so keep the behind-the-scenes content coming, please.