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 ...

Mika Amonsen will play Sean Reagan in the 'Blue Bloods' spinoff, 'Boston Blue,' a role previously played by Andrew Terraciano ...

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

Donnie Wahlberg hinted that the 'Blue Bloods' spinoff 'Boston Blue' on CBS is going to be all about starting fresh ...

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

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

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

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

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

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 ...