Casting My Galaxy: Building Characters from the Ground Up

Every great sci-fi world starts with imagination… but it’s the characters that make it unforgettable.

When I began building the universe of Galaxy’s Child, I knew I wanted more than tech and theory. I wanted characters who could grow, who could evolve across missions, relationships, losses, and triumphs.

World-building is one thing. But character-building is what makes that world matter.

Think of Data in Star Trek: The Next Generation. He begins as a machine, logical, calculated, emotionally limited. But by the end of the series, you can’t help but see him as beautifully human. That kind of transformation is something I’ve always found compelling.

The same is true for the cast of Galaxy’s Child, especially Philip Anders. He starts one way, but he won’t stay that way.

I won’t spoil what lies ahead, but I thought it would be fun to share the actors I imagine would best portray the main characters if Galaxy’s Child ever made it to screen. And more importantly, why.

Philip Anders – The Reluctant Genius

Actor: Dylan Minnette

Why: Dylan has a quiet intensity that makes him incredibly compelling to watch. He’s believable as someone introverted, intelligent, and emotionally layered, all traits that define Philip in Galaxy’s Child. What sets Dylan apart is his ability to portray a character who seems like he’s just barely holding it together, while still managing to push forward.

Philip isn’t a traditional action hero, he’s someone who struggles with loss, carries the burden of unrealized potential, and has to navigate both scientific pressure and personal guilt. Dylan has shown in roles like 13 Reasons Why that he can shoulder complex emotional arcs with honesty and restraint.

He doesn’t need to say much to make you feel a lot, and that’s exactly what Philip requires. Over time, as Philip grows into a role he never asked for, Dylan could bring that transformation to life in a way that feels real, earned, and deeply human.

Ava Shore – The Enigmatic Presence

Actor: Hailee Steinfeld

Why: Hailee brings an incredibly rare blend of strength, softness, and subtle emotional layering to her roles. She’s believable as someone with a sharp mind and strong convictions, yet she never comes across as cold, which is perfect for Ava.

What makes Hailee such a strong match is her ability to project empathy and curiosity while holding something back. Whether she’s commanding attention in Hawkeye or showing vulnerability in Dickinson, she always feels present—and that’s exactly what Ava needs: a presence that makes you lean in and wonder what she’s not saying.

There’s no question: if you want an actress who can sell the cockpit, bark an order, take a loss, and break your heart, all in one scene, Katee Sackhoff is the real deal.

Mike Parks – The Seasoned Leader Who Still Thinks for Himself

Actor: Ryan Reynolds

Why: At first glance, Reynolds might seem too relaxed or comedic for a military role, but that’s the genius of it. Mike Parks isn’t a stereotypical drill-sergeant type. He’s a trusted officer, a natural mentor, and a man with just enough rebellious instinct to make him dangerous in the right way. Reynolds brings that exact kind of energy.

He can play authority without being authoritarian. He can be dead serious when needed, but still knows how to cut tension with a single look or line. Mike’s the kind of guy who’s earned his rank, but hasn’t lost his humanity in the process. He’s also the only one who sees Philip Anders not as a liability, but as the key to everything. And Ryan Reynolds could sell that belief, honestly and without overplaying it.

Plus, you just know Mike’s going to have a few lines that hit hard with a smirk. And if anyone can deliver that balance of steel and soul, it’s Reynolds.

Brigadier General Mancuso – The Authority Behind the Curtain

Actor: Tom Cruise

Why: General Mancuso is the kind of character who doesn’t need to raise his voice to command a room. He’s sharp, strategic, and often three steps ahead of everyone else. When he speaks, people listen, not out of fear, but out of respect. Tom Cruise would bring that kind of authority with ease.

We know Cruise can lead (Top Gun, Edge of Tomorrow), but what makes him interesting here is his ability to play characters who walk the line between control and calculated risk. That’s Mancuso in a nutshell. He’s tasked with protecting Earth’s most advanced military program, but he’s also smart enough to know when to break from protocol, and that’s what makes him so compelling.

Cruise would bring gravity, credibility, and an intensity that would make every scene with Mancuso crackle with energy. And let’s be honest: watching him go toe-to-toe with Ryan Reynolds as Mike Parks? That’s a conversation we’d all want to see.

I’ve only scratched the surface here. Each of these characters has their own arc, some will rise, some will fall, and some will surprise you in ways I can’t reveal (yet). But casting them, even just in my mind, has helped me bring them to life as I write.And who knows? Maybe one day, we’ll see these stories on screen. Until then, I hope you enjoy discovering these characters as much as I’ve enjoyed creating

Leave a comment