Warning: Spoilers for Avengers: Endgame below.

Now that the spoiler ban has lifted on Avengers: Endgame, the cast and crew have been sharing behind-the-scenes footage and pictures from the shoot - offering an insane look into the complexity of the production.

Star Chris Evans, who plays Captain America in the franchise, has been sharing behind-the-scenes clips of what appears to be the final battle scene in the record-breaking blockbuster superhero film.

One clip shows an insane congregation of stars in costume, hanging out amongst rubble and debris and surrounded by a green screen background. Mark Ruffalo (in a motion-capture suit), Danai Gurira, Robert Downey Jr, Paul Rudd, Jeremy Renner and Chadwick Boseman can be seen chatting, while Tessa Thompson and Evangeline Lilly share a laugh in another conversation.

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Another clips shows Chris Hemsworth in costume as Thor, along with Pom Klementieff, Chris Pratt, Zoe Saldana and Karen Gillan on the same set.

Evans also shared clips of the Avengers cast with directors Anthony and Joe Russo filming a scene by a lake, which appears to be the location of Iron Man's house in the film.

The star also shared a number of behind-the-scenes images.

The Russo brothers themselves shared a behind-the-scenes clip of the very first scene of the film, in which Hawkeye's daughter is practising archery.

Another clip even depicts an unused take of Spider-Man (Tom Holland) reuniting with Iron Man (Downey Jr).

Meanwhile, both Mark Ruffalo and Chris Hemsworth also shared behind-the-scenes glimpses.

Avengers: Endgame has swiftly become the second-highest grossing film of all time globally, earning US$2.48 billion ($3.77b) behind Avatar's US$2.78 billion, according to Variety.