Oscar Isaac is undoubtedly the star of Moon Knight. But just like any other major production, there's a number of people behind the scenes who help create the superhero magic that keeps us coming back week after week.

One of the most notable jobs on a set is that of a body double. They're often used for shots when the actor's face doesn't need to be shown, but for whatever reason (nudity, performing a skill the main actor doesn't have, etc) the main actor is unable to be used. The body double needs to be able to move as the actor would so it's believable on camera. Playing Moon Knight is no doubt an exhausting job, so it makes sense that Oscar Isaac would need one. Plus, with some major twists in Episode 4, there's a surprising and exciting reason Isaac would need someone else to play him.

Of course, in our technologically advanced day and age, there are now more and more opportunities to use CGI in place of another person. But sometimes, nothing beats a real person you can direct on set to make sure the shots are perfect while in production. Plus, it gives the actor a real person to recite lines to, rather than imagining everything that's going on with a green screen. One simple example of this, also in the Marvel Cinematic Universe? You probably know that Bradley Cooper voices Rocket Raccoon in the Guardians of the Galaxy films. But did you know that when the movies are actually being filmed that he's played by Sean Gunn (brother of James!), who also plays Kraglin? Marvel loves to make sure someone is on set to make sure the actors really seem like they're talking to someone else.

But using a body double isn't the most interesting part of Isaac's acting in Moon Knight. It's actually more interesting to know who played his body double. We have the info for you down below.

Who was Oscar Isaac's Body Double in Moon Knight?

Oscar Isaac's body double was none other than his actual brother! According to IGN, Oscar Isaac's brother, journalist Michael Benjamin Hernandez, stood in as Moon Knight during key moments of the show when Moon Knight's multiple personalities (he suffers from dissociative identity disorder) appeared on screen as separate people.

And according to Marvel, Oscar Isaac texted his brother that he needed a stand-in or double to read lines with and asked if he wanted to do it."I was like, holy crap," Hernandez said. "Once he sent me that text, that was so exciting. I was just so stoked to join."

When Isaac spoke with Vanity Fair, he explained what it was like reading lines with his brother. “He’s a great actor and we share DNA, so he was very helpful. I couldn’t have done this with anyone else," he told the publication. "It was technically challenging to show up and decide which character I was going to play first, and then try to block that out and give my brother notes, and then do the scene, and then switch characters. But he really knows me so well, so we improvised sometimes together. It was so much fun."

Okay, so technically he mostly read lines while Isaac did the scenes. Still, it's not every day you can take your sibling with you to work, especially when you're an A-list actor. We'll see how Isaac and his brother's scene work played out in the final two episodes of Moon Knight.

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Milan Polk
Milan Polk is an Editorial Assistant for Men's Health who specializes in entertainment and lifestyle reporting, and has worked for New York Magazine's Vulture and Chicago Tribune.