Who Is Mika Amonsen? Meet the ‘Boston Blue’ Star Playing Sean Reagan

Boston Blue will see the return of several Blue Bloods characters, but one will have a different face. Mika Amonsen takes over the role of Danny Reagan’s (Donnie Wahlberg) youngest son, Sean Reagan, on the new CBS series Boston Blue, which premieres on Friday, October 17. Andrew Terraciano previously portrayed the character on all 14 seasons of Blue Bloods, which ran on CBS from 2010 to 2024. Boston Blue will pick up with Sean now living in the titular Massachusetts city, continuing his family’s legacy by becoming a Boston Pd patrolman. While Sean left New York City to forge his own path, his work and family lives become intertwined when Danny moves…