If you’ve sat down for a Sunday night dinner with the Reagan family at any point over the last fourteen years, you know Andrew Terraciano. He basically grew up on our TV screens. We saw him go from a little kid losing his mom to a college student trying to find his way in a family of titans.
Most people know him as Sean Reagan on Blue Bloods, but lately, the conversation has shifted. With the premiere of the spinoff Boston Blue in late 2025, fans were shocked to see a different face in the role he occupied for nearly 300 episodes. It’s a weird situation.
Usually, when a show runs that long, the actors become synonymous with the characters. So, what exactly happened? Let’s look at the career trajectory of Andrew Terraciano and where he’s actually been appearing outside the halls of 1 Police Plaza.
The Blue Bloods Legacy and the Sean Reagan Recast
For 14 seasons, Andrew Terraciano was a staple of the Reagan family dinner table. He started the show in 2010 when he was just six years old.
Honestly, the chemistry was so natural because he wasn't alone. His real-life older brother, Tony Terraciano, played his on-screen brother, Jack. They weren't just acting like siblings; they were living it.
As the show progressed, Sean Reagan’s character arc became one of the most grounded parts of the series. While Danny was out kicking down doors, Sean was dealing with normal stuff—school, dating, and the massive weight of the Reagan name. But then came the spinoff, Boston Blue.
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When the news broke in July 2025 that Mika Amonsen would be taking over the role of Sean Reagan for the new series, the internet kind of melted down. Fans felt like Andrew had been "screwed over," to put it bluntly. However, the showrunners, including Brandon Margolis, explained that they wanted a "different energy" for Sean as he transitioned into being a rookie cop in Boston.
Andrew himself handled it with a lot of class. In a December 2025 interview with US Magazine, he mentioned that he felt he got to "send Sean off into the world" and was happy to see someone else take the baton.
Andrew Terraciano Movies and TV Shows: The Full List
While Blue Bloods is the 800-pound gorilla on his resume, Andrew hasn't just been sitting around waiting for dinner scenes. He’s been branching out, though he’s kept a relatively low profile compared to some of his co-stars.
1. Blue Bloods (2010–2024)
This is obviously the big one. He appeared in 291 episodes. That is a staggering amount of time for any actor, let alone a child actor who managed to stay out of the tabloid drama that usually plagues young stars.
2. Rogue Assistant (2014)
This was a short film that saw Andrew working alongside his twin sister, Molly Terraciano. It’s a bit of a deep cut for fans, but it showed that the acting bug ran through the whole family, not just the boys. The film followed an aspiring writer assistant dealing with a washed-up actress, and Andrew got to flex some different creative muscles outside the procedural format.
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3. The Antipodes (2025)
This is where things get interesting for his post-Reagan career. Andrew has been focusing heavily on theater lately. In April 2025, he played the role of Danny M1 in a production of The Antipodes directed by Sabrina Carlier.
4. A First Step Into Darkness
Andrew has also been involved in independent and student film projects to sharpen his dramatic range. He recently played a character named Det. John Alexander in a project titled A First Step Into Darkness. It’s a bit poetic that even outside the Blue Bloods universe, he’s still finding himself in detective roles.
Why the Recast Actually Makes Sense
Look, it’s hard to see a new actor play a character you’ve watched for over a decade. But from a production standpoint, the move to Mika Amonsen for Boston Blue was about the "vibe" of the new show.
Boston Blue is darker. It’s grittier.
The producers felt they needed someone who looked like they’d been through a meat grinder to play Sean as an ambitious rookie officer. Andrew, who recently graduated college in May 2025, has always had a more thoughtful, sensitive energy on screen.
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There's also the reality of life. While Donnie Wahlberg and the rest of the crew were moving toward the spinoff, Andrew was finishing his degree and potentially looking toward a Master's. Sometimes "creative differences" is just code for "the kid wants to go to school and live a normal life for five minutes."
Life After the Dinner Table
What most people get wrong is thinking Andrew is "done" with acting because he isn't in the spinoff. Far from it.
He's currently represented by Innovative Artists and has been active in the New York theater scene. He’s 22 now. He’s 5'9", he’s got blue eyes, and he’s no longer that little kid sitting next to Grandpa Frank.
If you check out his professional profiles on sites like Backstage, you'll see he's listed with a playing age of 18-26. He’s effectively "rebranding" himself from a child star into a serious adult actor.
Actionable Takeaways for Fans
If you’re a fan of Andrew and want to keep up with what he’s doing next, here is how to navigate the "post-Blue Bloods" era:
- Don't expect him in Boston Blue: Unless there’s a massive surprise cameo, Andrew has officially handed over the Sean Reagan badge.
- Watch the New York stage: Andrew is leaning into theater. If you’re in NYC, keep an eye on off-Broadway listings or NYU-affiliated productions where he has been active.
- Follow the graduation trail: He’s been vocal about his academic pursuits. If you see him "missing" from Hollywood for a bit, he’s likely hitting the books.
- Check out the short films: If you can find a screening of Rogue Assistant, it's a great look at his early range alongside his sister.
The transition from child actor to adult performer is notoriously difficult. Many people fail. But by stepping away from the "Reagan" safety net and challenging himself with stage work and higher education, Andrew Terraciano is playing the long game. We haven't seen the last of him; we're just seeing the end of a very long first chapter.