Zack Snyder's "Justice League" has finished principal photography, and now it's time for the cast and crew to celebrate.

Star Jason Momoa, who plays Aquaman in the Warner Bros. film, marked the occasion today by posting a photo of himself on Instagram, where he expressed regrets for not being able to attend tonight's wrap party. "Justice League" has been filming in London since April.

"There's [too] many people to thank for all their hard work [on] JL," he wrote. "Tonight is our wrap party. I am so thankful for my cast and crew. I love you. I have never in my life missed a wrap party. But as you all know I'm a huge fan of the food and merriment!!!!"

There's to many people to thank for all their hard work JL. Tonight is our wrap party. I am so thankful for my cast and crew. I love you. I have never in my life missed a wrap party But as you all know I'm a huge fan of the food and merriment!!!! ???????????????Unfortunately I prepare for the north. For those that will be there. I WON'T let you down Shaka aaalllooohhhaaa see u Monday xxxxxxxxxxxxxxx aquaman

A photo posted by Jason Momoa (@prideofgypsies) on

Why is the actor missing out on the celebration? He mentioned that he's preparing "for the north," which is likely a reference to "Justice League" also shooting in Iceland, and not a sign of Khal Drogo's return to "Game of Thrones" (sorry, GOT fans).

In "Justice League," Batman assembles a team of heroes to confront the threat to Earth posed by the DC Comics villain Steppenwolf.

Opening Nov. 17, 2017, "Justice League" also stars Ben Affleck as Batman, Henry Cavill as Superman, Gal Gadot as Wonder Woman, Ezra Miller as The Flash and Ray Fisher as Cyborg, with Amy Adams as Lois Lane, Jeremy Irons as Alfred Pennyworth, Jesse Eisenberg as Lex Luthor, J.K. Simmons as Commissioner Gordon, Willem Dafoe as Vulko and Amber Heard as Mera.

(via Screen Rant)