Aquaman reached a major box-office milestone on Sunday as it crossed $1 billion worldwide, but director James Wan's blockbuster isn't finished just yet. The film overtook the lifetime domestic gross of Man of Steel on Wednesday, with $291.6 million.

Director Zack Snyder's 2013 film, which retroactively launched the so-called DC Extended Universe, completed its U.S. theatrical run with just north of $291 million. Globally, Aquaman has earned nearly twice as much as Man of Steel.

RELATED: Aquaman Is Now the DC Extended Universe's Highest-Grossing Film

Starring Jason Momoa, Aquaman has $733.6 million overseas, for a global haul of $1.025 billion. That's more than Christopher Nolan's The Dark Knight, which earned $1.004 billion in 2008, and places the action-adventure within striking distance of 2012's The Dark Knight Rises, which, with a lifetime total of $1.08 billion, is the top-grossing DC movie to date.

Aquaman is the first DCEU release to cross $1 billion; Batman v Superman: Dawn of Justice fell short in 2016 with $873.6 million.

RELATED: Every Superhero Move That Hit $1 Billion At the Global Box Office

Wan's feature owes its commercial success to the international box office, specifically China, the world's second-largest film market, where it's enjoyed an extended release and blockbuster success.

Directed by James Wan, Aquaman stars Jason Momoa as Aquaman, Amber Heard as Mera, Patrick Wilson as Ocean Master, Willem Dafoe as Nuidis Vulko, Yahya Abdul-Mateen II as Black Manta, Temuera Morrison as Thomas Curry, Dolph Lundgren as Nereus and Nicole Kidman as Queen Atlanna.