Gal Gadot and Amber Heard shone brightly on the red carpet on Monday.
Gadot, who plays Wonder Woman, was all smiles in a shimmering gold Altuzarra gown with a thigh-high slit.
Heard, who portrays Mera, stunned in a similarly leggy look of a black, elaborately beaded gown.
"What a night..... so proud to have celebrated Justice League debut with my favorite and most beloved humans," Heard captioned a photo with friends on Instagram.
"Thank you for never missing one of these nights."
Gadot was joined on the red carpet by co-stars Ben Affleck, Henry Cavill, Ezra Miller, Jason Momoa and Ray Fisher, who play Batman, Superman, the Flash, Aquaman and Cyborg, respectively.
Diane Lane and Connie Nielsen also attended the event.
"Justice League" was directed by Zack Snyder, who stepped back during post-production following his daughter Autumn's death.
The movie opens in theaters Friday, Nov. 17.
Deadline reported Monday that the sequel's premiere is being moved up a month to November 2019.