The actress then shared her own image of lady Mera.
The character of Mera, played by Amber, will make her debut in the movie Justice League, out on November 17, 2017.
The Aquaman trade paperback she's reading is particularly interesting as it features Mera and Arthur Curry battling undersea monsters known as the Trench, characters who've been rumoured to be making an appearance in this movie.
Earlier in the day, Amber posted a photo of herself getting ready for day one of filming.
Director Wan waxed a bit philosophical in an interview from 2016 with Slash Film, in which he talked about Aquaman, and how most people have heard at least something about the comic book hero.More news: Exxon to Import Own Fuel to Supply New Gas Stations in Mexico
Mera has finally emerged from the sea. The training sessions had the added benefit of ensuring Amber had curves in all of the right places, once she slipped into that slinky Mera outfit.
In all the pictures shared, the Aquaman star looked prepared to kick some a** and she looks like a complete badass.
She was married to her The Rum Diary co-star Johnny Depp from 2014 until 2016.
What did you think of Amber Heard's new look as Mera?
More on Aquaman as we hear it. The DCEU film stars Jason Momoa, Heard, Willem Dafoe, Temuera Morrison, Dolph Lundgren, Yahya Abdul-Mateen II, Ludi Lin, Patrick Wilson and Nicole Kidman and opens on December 21st, 2018.