Mika Amonsen will replace Andrew Terraciano, who played Sean Reagan throughout the 14-season run of "Blue Bloods." ...

Danny Reagan’s youngest son Sean will look a little different when he appears alongside his dad on CBS’ upcoming drama series ...

Danny Reagan will be bringing a Blue Bloods family member with him to Boston Blue - but they’ll look very different to ...

Mika Amonsen ( Thanksgiving) has joined the show’s cast as Sean Reagan, the youngest son of series lead Donnie Wahlberg’s ...

Although “Boston Blue” is a direct offshoot of “Blue Bloods,” the Reagan family will look a bit different this time around.

Throughout the 14 seasons of 'Blue Bloods,' through the series finale, the character was played by Andrew Terraciano.

Boston Blue, the Blue Bloods spinoff, recast Sean Reagan, Danny Reagan's son, with Mika Amonsen replacing Andrew Terraciano in a shocking twist ...

W hen Blue Bloods ’ Danny Reagan (Donnie Wahlberg) moves to Boston in the CBS spinoff Boston Blue, he won’t be the only Reagan making the move. His youngest son Sean, who has been played by Andrew ...

CBS’ upcoming Blue Bloods offshoot has added another Reagan - though he will look a bit different when he shows up. Related Stories ...

The actor is reprising his role as Danny Reagan but will be tackling crime in a new East Coast city, alongside Sonequa Martin ...

Check out Wahlberg’s Instagram story above and stay tuned to Collider for more about Boston Blue.

Blue Bloods wrapped its final season almost seven months ago, but there's a fresh chapter about to begin. Wahlberg revealed ...