Mika Amonsen is speaking out about his new role on the hit police drama Blue Bloods. He has taken over the part of Sean Reagan, the son of Danny Reagan played by Donnie Wahlberg. The character was previously portrayed by Andrew Terraciano for 14 seasons.
Amonsen discussed the unique challenges of joining a long-running series. He spoke candidly about the pressure he felt in a recent interview with Us Weekly.

Embracing the Legacy of a Beloved Character
Amonsen admitted to feeling significant pressure when he first got the part. He wanted to honor the work of the actor who came before him. “I definitely felt a ton of pressure at first,” he told the publication.
He was determined to respect Andrew Terraciano’s portrayal. This intention influenced some of his early creative choices for the character. He even considered specific visual aspects like hair styling to maintain continuity for fans.
The actor felt a deep responsibility to the show’s loyal audience. He aimed to keep Sean’s essence as close as possible to the character viewers already loved. This approach was his way of honoring the legacy built over more than a decade.
A Rapid Transition and Intensive Preparation
The entire process happened very quickly for the new cast member. He was thrust into the Blue Bloods universe with little time to prepare. “When I booked the show, it all happened really quickly,” Amonsen recalled.
He had roughly one week between booking the role and starting work. To get up to speed, he embarked on a binge-watching marathon of the series. He strategically focused on the most recent seasons to understand Sean’s contemporary arc.
Amonsen believed the later episodes were more crucial for his preparation. He needed to grasp who Sean had become as a young adult. Understanding the dynamic between Sean and his on-screen father, Danny, was a particular priority.
The final season of Blue Bloods continues to air, featuring Mika Amonsen in his new role. Fans are now seeing his interpretation of Sean Reagan unfold on screen. This new chapter for the Reagan family is a significant moment for the long-running series.
Thought you’d like to know
Who did Mika Amonsen replace on Blue Bloods?
He replaced actor Andrew Terraciano. Terraciano originally played Sean Reagan for 14 seasons before Amonsen took over the role for the final season.
What character does Mika Amonsen play?
Amonsen plays Sean Reagan, the son of Detective Danny Reagan. Sean is a central member of the Reagan family on the show.
How did Amonsen prepare for the role of Sean?
He binge-watched later seasons of Blue Bloods to understand the character’s recent development. He focused on Sean’s adulthood and his relationship with his father, Danny.
Why did Amonsen feel pressure taking the role?
He felt pressure to respect the character’s history and the actor who built the role. He wanted to honor the Sean Reagan that fans already knew and loved.
Is Blue Bloods ending?
Yes, the show is currently airing its fourteenth and final season. The series will conclude later this year.
Blue Bloods, Sean Reagan, Mika Amonsen, Donnie Wahlberg, Andrew Terraciano, cast change, CBS, final season, police drama
Yoast Focus Keyphrase: Blue Bloods Sean Reagan
Slug: blue-bloods-sean-reagan-new-actor
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