Mika Amonsen Addresses Sean Reagan Backlash in Boston Blue Role

The casting of Mika Amonsen as Sean Reagan in the new spinoff series Boston Blue has sparked a mixed reaction from fans. Amonsen, who replaces Andrew Terraciano in the role, acknowledged the backlash but also highlighted the support he has received from fans. In an exclusive interview with Us Weekly, Amonsen stated, “There’s been some negativity, for sure,” while noting that many fans are rallying behind his portrayal of the character.

Originally introduced in the long-running series Blue Bloods, which aired from 2010 to 2024, Sean was the youngest son of fan-favorite character Danny Reagan, played by Donnie Wahlberg. The character had been portrayed by Terraciano throughout the 14 seasons of the show. Following the conclusion of Blue Bloods, CBS launched Boston Blue, bringing Amonsen into the fold to continue the Reagan family legacy.

Amonsen expressed the pressure he felt stepping into the role. “I definitely felt a ton of pressure at first. I felt the pressure to respect an actor before me because I wanted to respect Andrew the best I could,” he said. To honor Terraciano’s portrayal, Amonsen made specific choices regarding the character’s physical appearance and mannerisms. “There were even certain visual choices that I made that I wanted to keep in terms of hair styling and certain ways of being [as Sean],” he explained.

In preparing for the role, Amonsen immersed himself in the series, particularly focusing on the later seasons to better understand Sean’s development into adulthood and his relationship with his father. “I binge-watched as much as I could and I found doing the later seasons was more helpful,” he noted. His aim was to capture the essence of Sean, while also adding elements of his own interpretation to the character.

The new series explores uncharted territory for Sean, with narratives that had not been previously explored in Blue Bloods. “We’re really just exploring what would have been,” Amonsen stated, emphasizing the fresh dynamics that Boston Blue brings to the Reagan family story.

Amonsen’s approach balances respect for Terraciano’s legacy with his own energetic style. He remarked, “Watching Andrew’s performance, I actually noticed a lot of similarities just between us as people, and our energy. It’s quite upbeat.” This connection has allowed him to stay true to his personality while developing a unique interpretation of Sean.

The first episode of Boston Blue aired on March 15, 2024, and has since generated significant interest among fans. Amonsen’s commitment to honoring the character while making it his own has resonated well with viewers, who are eager to see how Sean’s storyline evolves in this new chapter.

As the series progresses, Amonsen remains focused on delivering a performance that both respects the past and embraces new possibilities. With Boston Blue airing on CBS Fridays at 22:00 ET, audiences are looking forward to witnessing the next phase of the Reagan family’s saga.