Mika Amonsen has joined the CBS drama in a series regular role playing the youngest son of Donnie Wahlberg’s character, Danny Reagan.

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.

Mika Amonsen has joined the cast of CBS’ ‘Blue Bloods’ spinoff ‘Boston Blue,’ playing the younger son of Donnie Wahlberg’s character, Danny Reagan.