He sits there in his oversized Harry Potter glasses, looking like he’s one bad day away from a permanent internal retreat into his own imagination.
Austin Miller.
If you've watched even ten minutes of the show, you know him as the quiet kid who gets lost in the shuffle while Georgia is outplaying the mayor and Ginny is having a generational identity crisis. But if you’re looking for the heart of the Ginny and Georgia cast brother dynamic, you have to look closer at Diesel La Torraca, the young Australian actor who has somehow managed to grow up in front of millions of people while playing a character who is chronologically stuck in elementary school.
Who Exactly is the Brother in the Ginny and Georgia Cast?
Basically, there are two ways people search for "the brother" in this show. Usually, they're talking about Austin Miller, the sweet, socially anxious nine-year-old son of Georgia Miller. But sometimes, fans are hunting for Marcus Baker, played by Felix Mallard, who is the brooding "bad boy" brother of Max.
Let's focus on Austin first. Because honestly? He’s the one holding the most trauma in that house.
Diesel La Torraca was born on March 1, 2011. That makes him 14 years old right now in 2026. If you noticed he looked a little... different in Season 3, you aren't crazy. While his character Austin is supposed to be around nine or ten, Diesel went through a massive growth spurt between seasons. It’s that classic Netflix problem where the kids age three years in real life while only three days pass in the script.
The Real-Life Siblings You Didn’t Know About
The Ginny and Georgia cast brother connections actually go beyond the screen. Did you know there are real-life siblings in the cast?
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- Raymond Ablack plays Joe, the owner of Blue Farm Café and everyone's favorite slow-burn love interest.
- Rebecca Ablack plays Padma, Ginny’s coworker and Marcus’s former flame.
Yep. They are actual siblings in real life. It’s kinda wild to see them in the same scenes, knowing they probably fought over the TV remote as kids in Toronto. It adds this weirdly wholesome layer to a show that is usually pretty dark.
The Austin Miller Dilemma: Growing Up Too Fast
Diesel La Torraca has been incredibly vocal about the "growth spurt" issue. In a 2025 interview with Teen Vogue, he joked about having to "slouch a little bit" and "heighten his voice register" to keep playing a nine-year-old.
It's a tough gig.
In Season 3, fans on TikTok went viral for pointing out that Austin looks like a "grown man in Harry Potter glasses." It’s a bit of an exaggeration, but you've gotta feel for the kid. He started this show when he was eight. Now he’s a teenager trying to channel the energy of a child who still believes in magic.
What Makes Austin’s Character So Heavy?
Austin isn't just "the brother." He’s the physical manifestation of Georgia’s mistakes.
While Ginny confronts Georgia with words, Austin reacts with silence—or violence. Remember when he stabbed Zach with a pencil? Or when he shot his own father, Gil Timmins? That wasn't just "kid drama." That was a child reaching his breaking point.
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The casting of Aaron Ashmore as Gil was a stroke of genius. He and Diesel actually look alike. They share that same slightly haunted, wide-eyed look. It makes the scenes where Gil is manipulative feel ten times more predatory because you can see Austin’s future self standing right in front of him.
Felix Mallard: The Other "Cast Brother"
We can't talk about the brothers of Wellsbury without mentioning Marcus Baker.
Felix Mallard brings a totally different energy. While Austin is the "little brother" everyone wants to protect, Marcus is the "twin brother" who doesn't know how to ask for help. His relationship with Max (Sara Waisglass) is one of the most realistic portrayals of sibling dynamics on TV. They love each other, but they also find each other absolutely exhausting.
Max is high-energy, theater-obsessed, and loud. Marcus is depressed, quiet, and internal. It’s a classic foil.
Fun Fact: Felix Mallard is actually Australian too. Between him and Diesel, the "Wellsbury" brothers are basically an Aussie invasion.
Why the Brother Dynamic Matters for Season 4
As we look toward the future of the show, Austin is the one to watch.
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He saw his mom get arrested at her own wedding. He saw his dad get shot. He knows things Ginny doesn't even know. Most people get Austin wrong; they think he’s just a sidekick to Ginny’s angst. In reality, Austin is the most dangerous person in that family because he has learned how to hide his emotions from a master—Georgia.
If you’re following the Ginny and Georgia cast brother updates, keep an eye on Diesel’s social media. He’s been posting more about his music and his life in LA, which suggests he’s transitioning into more "grown-up" roles. This might mean Season 4 has to address his age head-on. Maybe a time jump? Honestly, it’s the only way to make it look believable at this point.
What Most People Get Wrong
The biggest misconception is that Austin is "fine" because he’s a kid.
Experts in child psychology often point to characters like Austin as examples of "externalizing" vs "internalizing" trauma. Ginny is a cutter; she hurts herself to cope. Austin is becoming a protector; he hurts others to keep his mother safe. It’s a dark path for a "little brother" character.
Actionable Steps for Fans
If you're obsessed with the cast and want to keep up with the Miller/Baker brother drama, here is what you should actually do:
- Follow the Ablack Siblings: Check out Raymond and Rebecca’s joint interviews. Their chemistry is hilarious and way more upbeat than the show.
- Watch "Little Monsters": If you want to see Diesel La Torraca before he was Austin, watch this movie. He stars alongside Lupita Nyong'o and it proves he’s had acting chops since he was tiny.
- Rewatch Season 2, Episode 9: This is the turning point for the "brother" narrative. Pay attention to Austin's face when Gil is around. It’s a masterclass in child acting.
- Stay Updated on Season 4 Filming: Production schedules in 2026 are tighter than ever. Keep an eye on Netflix’s official "Tudum" site for the first look at "Teenage Austin."
The Miller family is a mess. But without the brothers—the quiet one and the moody one—the show would just be another suburban drama. They are the ones who remind us that in the world of Ginny and Georgia, nobody gets out without a few scars.