Donnie Wahlberg and Bridget Moynahan of “Blue Bloods” certainly know how to act like siblings on the show. But how do they treat each other in real life?
All evidence suggests that the answer is yes. Several cast members have stated in interviews that the “Blue Bloods” cast operates like a family at this point. After all, they’ve spent the last 12 years working on this show, which is part police procedural and all familial relationships.
And the on-screen relationship between Wahlberg and Moynahan’s characters is usually tense. Danny Reagan sees things through the eyes of an investigator, whereas Erin Reagan sees things through the eyes of a defense attorney. But beneath all of the squabbling is a solid core of love and devotion to the other sibling.
That appears to be what motivates the “Blue Bloods” stars in real life as well. Moynahan discussed cast relationships with AOL’s Build Series in 2019.
“Everyone on the cast, we’ve just become like a family,” said Moynahan. “We just fell into these relationships really easily, and we’ve just grown with each other over the last ten years.”

Their “Blue Bloods” characters have matured as well. And after that much time, you either grow to adore the people you work with… or you grow to despise them. But, as Wahlberg stated a few months before Moynahan’s interview, this cast has no ill will toward one another.
“We have a real dynamic, like a real family,” Wahlberg said on Kelly and Ryan. “Bridget Moynahan is my confidante and sister, and we’re very close friends.” Will Estes is a fantastic actor who reminds me of my younger brother. And, of course, Tom Selleck is similar to our father.”
It’s heartwarming to hear Wahlberg specifically mention each co-star. And it proves beyond a shadow of a doubt that the “Blue Bloods” cast is fast friends on and off the set.

Tom Selleck, star of ‘Blue Bloods,’ discusses why the show has lasted so long.
Most casts do not have the opportunity to bond as much as the cast of “Blue Bloods.” Few shows last 12 seasons or more, but the CBS procedural doesn’t appear to be slowing down anytime soon.
Tom Selleck, star of “Blue Bloods,” recently spoke with Rachel Ray about his success. He gave the TV personality three solid reasons why the show has lasted so long in the face of fierce competition.
“It’s still on because we have great actors, great characters, and good writing.” “Because I’m not bored with it,” Selleck admitted.
“Well, what has always worked for me, or what my appetites are… they go to the words, ‘character-driven shows,'” he continued. So [Magnum P.I.] was a show about characters. I can’t recall half of the plots. Far, far less than half. And when I saw this [Blue Bloods] script, it was character-driven in an era when there are so many procedurals.”