How Old Is The Actor That Plays Jeremiah Fisher

If you’ve been glued to The Summer I Turned Pretty like the rest of us, you’ve probably asked yourself one burning question: How old is the actor that plays Jeremiah Fisher? It’s a fun rabbit hole because the show plays fast and loose with time, and Jeremiah is the fan-favorite golden retriever boy we all root for. Knowing his real age helps you appreciate his performance—and maybe figure out if you’re crushing on a teenager or a full-grown adult.

The age gap between character and actor

On screen, Jeremiah Fisher is a high school junior, roughly 16 or 17 years old. But the actor who plays him, Gavin Casalegno, was born on September 2, 1999. That makes him 25 years old as of 2025.

So yes, he’s playing a teenager while actually being a full decade older in real life. This is incredibly common in Hollywood—actors in their twenties often portray teens because of labor laws and the need for more experienced performers.

Why this matters for the show

Gavin’s age gives him the emotional depth to handle Jeremiah’s arc—from a carefree jokester to a heartbroken young man navigating love and family drama. A younger actor might not have the maturity to nail those intense beach-house scenes.

“Being 25 actually helps me understand Jeremiah’s pain better than I could have at 17,” Gavin once joked in an interview.

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How his age compares to the cast

For context, Christopher Briney, who plays Conrad Fisher, is born March 24, 1998, making him 27 years old. So the Fisher brothers are just two years apart in real life, which is pretty close to their on-screen sibling dynamic.

And Lola Tung, who plays Belly, was born October 28, 2002, making her 22 years old. That means the love triangle is actually between a 25-year-old, a 27-year-old, and a 22-year-old—very much adult actors in their twenties.

What fans have noticed

Fans on TikTok and Reddit love pointing out that Gavin looks “ageless” because he can pass for a teenager without even trying. Some viewers are shocked to learn he’s already 25—he’s got that youthful smile and energy that sells the character perfectly.

How Old The Summer I Turned Pretty Cast Really Is - Brit + Co

Others joke that Jeremiah’s “baby face” is just good genes and sunscreen. But being older also gives Gavin the confidence to film intense emotional scenes without the awkwardness of a real high schooler.

Fun facts about Gavin Casalegno

Before he was Jeremiah, Gavin started acting at age 10 in a short film called The Last Deal. He also played a younger version of a character in the 2014 movie Noah—directed by Darren Aronofsky.

Cast of The Summer I Turned Pretty (Season 1–3) | Lola Tung

He’s also a musician and posted covers on YouTube before his big break. So his age means he’s got years of experience under his belt, which shows in every scene he steals.

The bottom line

So, how old is the actor that plays Jeremiah Fisher? 25 years old—a grown man who perfectly embodies a lovesick teen. Next time you watch a scene, remember it’s a veteran performer making you feel all those butterflies.

It’s a simple number, but it changes how you see the show. Now you can impress your friends with this trivia at your next watch party. And maybe stop feeling guilty about your crush—he’s legally old enough to handle it.