Robert Downey Jr. Shares BTS 'Avengers: Endgame' Photos From Major Iron Man Moment [SPOILERS]

This story includes spoilers for 'Avengers: Endgame.'

When Avengers: Endgame was officially out in theaters for over a week, Marvel lifted the spoiler ban it had on the cast and crew of the film, along with the fans.

Now, stars from the record-smashing movie are sharing photos and videos from the set left and right on social media. Chris Pratt was one of the first to share a video from the set, featuring nearly every major star in the film. "Nobody was allowed to film anything on their phones. I said screw it," Pratt captioned the post.

Chris Evans joined in on the fun, sharing plenty of of videos and photos, including an epic selfie with co-stars Jeremy Renner, Mark Ruffalo, Chris Hemsworth and Robert Downey Jr.

But the best post from behind-the-scenes may have came from Downey, who shared on-set shots of one of the film's most emotional scenes late Thursday evening. At the end of Endgame, Tony Stark obtains all six Infinity Stones and snaps his fingers to vanquish Thanos and the Dark Order. But as we all know by now, the snap's force was too devastating for Stark, who dies a hero's death.

Downey shared a series of photos of the iconic scene to Instagram, capturing the moment on three screens on set. The Iron Man actor is seen snapping his fingers, with each photo showing the progression of emotions on his face as he saves the universe, but ultimately sacrifices himself.

Among the hashtags Downey used in the caption was #3000, a number that gets every Marvel fan a little teary-eyed when they hear or see it now.

Endgame was an emotional roller coaster from start to finish and it perfectly culminated the 11-year-long Infinity Saga. Fans greatly appreciated the way Marvel closed out the era and judging by the heartwarming posts from the film's stars, they also recognize the importance of the movie.