In a video promoting the superhero-themed ABGO fantasy football league, Avengers: Endgame co-director Joe Russo and Spider-Man movie star Tom Holland apparently revealed the "secret Chris handshake" done by fellow Avengers cast members Chris Pratt and Chris Hemsworth.The video opens with Russo wearing a paper bag over his head with the name "Pratt" written on it. Holland then enters the frame with his own paper bag reading "Hemsworth." It is at this point that "Chris Pratt" and "Chris Hemsworth" perform the "secret Chris Handshake," before proceeding to converse with one another in-character.RELATED: Avengers: Endgame Art Provides Clear Look at Captain Marvel's New Uniform

While the two begin by asking one another about their lives and personal ventures, the conversation soon devolves into "Chris Pratt" criticising Tom Holland's performance in the fantasy football league, before "Chris Hemsworth" proceeds to do the same to Joe Russo.

Before too long, Joe's brother and co-director Anthony Russo turns up, removing the paper bags from their heads and putting the kibosh on the whole charade (as if it was fooling anyone.) However, Holland and Joe Russo did manage to get one more "secret Chris handshake" in before going their separate ways.

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Directed by Joe and Anthony Russo, Avengers: Endgame stars Robert Downey Jr. as Iron Man, Chris Evans as Captain America, Mark Ruffalo as Bruce Banner, Chris Hemsworth as Thor, Scarlett Johansson as Black Widow, Jeremy Renner as Hawkeye, Brie Larson as Captain Marvel, Paul Rudd as Ant-Man, Don Cheadle as War Machine, Karen Gillan as Nebula, Danai Gurira as Okoye and Bradley Cooper as Rocket, with Gwyneth Paltrow Pepper Potts, Jon Favreau as Happy Hogan, Benedict Wong as Wong, Tessa Thompson as Valkyrie and Josh Brolin as Thanos. The film is available on Digital HD, Blu-ray and 4K UHD.