DC's Man of Steel himself, Henry Cavill, just kicked up his costumed feet, downed most of a mug of coffee, and posted a lengthy rundown of Superman's comic book history. The Instagram photo for that is pretty classic, and Cavill followed it with a shot with "Wonder Woman" herself, Gal Gadot, to congratulate her on the success of her first solo movie.

Gadot's Diana Prince debuted in "Batman v Superman: Dawn of Justice," opposite Henry Cavill's Clark Kent and Ben Affleck's Bruce Wayne. "Justice League" will bring Gadot and Affleck together with a new team, and Cavill's role is being left to speculation, since his Superman didn't end "BvS" in the best position.

But we know he'll be back, and lest you forget he's still DC's Super-est superhero, Cavill shared this history lesson in full costume:

Hi Everyone! I've been doing some Super Ruminations because this month is the 79th anniversary of Superman in Action Comics and thought it fitting to pass on this little fact. Who knew eh?? In January 1933, Jerry Siegel wrote a short story titled "The Reign of the Superman", which was illustrated by his friend Joe Shuster and self-published in a science fiction magazine. It told the story of a bald villain with telepathic powers. Trying to create a character they could sell to newspaper syndicates,Siegel re-conceived the "superman" character as a powerful hero, sent to our world from a more advanced society. He and Shuster developed the idea into a comic strip, which they pitched unsuccessfully. National Publications was looking for a hit to accompany their success with Detective Comics, and did not have time to solicit new material. Because of the tight deadline, editor Vin Sullivan was forced to make it out of inventory and stockpile pages. Sullivan asked former coworker Sheldon Mayer if he could help. Mayer found the rejected Superman comic strips, and Sullivan told Siegel and Shuster that if they could paste them into 13 comic book pages, he would buy them. #SuperRuminations #Superman #ActionComics

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There's just something adorable about that.

And here's Cavill praising his fellow DC stars for "Wonder Woman":

Congratulations to my DC family members Gal, Patty, Chris and the whole Wonder Woman team for an incredibly successful weekend!! You guys nailed it. @gal_gadot #PattyJenkins #ChrisPine #WonderWoman

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So far, "Wonder Woman" is the best-reviewed film of the DC Extended Universe, which began with Cavill's "Man of Steel" in 2013, and continued with "BvS," "Suicide Squad," and "Wonder Woman." "Justice League" is next, opening November 17.

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