Mika Amonsen has been cast as Sean Reagan on Boston Blue opposite Donnie Wahlberg. On Blue Bloods, Sean was played by Andrew ...

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

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

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’s upcoming “Blue Bloods” spinoff has recast Danny Reagan’s son after the same actor played the recurring role throughout the original 14 seasons.

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

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

Boston Blue made a shocking cast change for the role of Danny Reagan's son, Sean. Mika Amonsen was added to the cast of the ...

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

Boston Blue will bring in another Reagan family member to join Donnie Wahlberg, but with a different actor in the role.