Donnie Wahlberg Started Calling Tom Selleck 'Dad' After His Mom Died — Selleck Calls Him Son

For most of Blue Bloods' run, Donnie Wahlberg watched Tom Selleck from across a dinner table — in character, technically, but absorbing something real. Selleck, who plays NYPD Commissioner Frank Reagan with the particular authority of someone who has been doing this since 1980, does not make a habit of performing warmth. He projects it, or he does not. On set, according to Wahlberg, the difference is real.

"Tom's a leader himself," Wahlberg told Outsider. "He's a very experienced, very smart guy. Very dedicated, much like myself. There are times when we both see the hidden game, and we both want the same thing — but we have different ideas on how to get there."

Wahlberg has played Detective Danny Reagan since the show started in 2010. For over ten years, the two actors dealt with the normal disagreements that happen when two strong-minded people care about the same job. Wahlberg does not call this fighting. Instead, he compares it to learning a dance together.

Wahlberg has played Detective Danny Reagan since the show's premiere in 2010. Over more than a decade of Fridays on CBS, the two actors worked through the natural tension that comes when two strong-willed people care about the same project. Wahlberg does not describe that as conflict, he compares it to learning a dance together.

"Knowing when to step up and give input, and when to trust Tom to take the lead," he said. "It's as truthful off-screen as it is for Danny and Frank on the show."

The parallel between the on-screen father-son dynamic and the off-screen one was not something Wahlberg planned for — it was something he recognized from his own life. He grew up one of nine siblings in Dorchester, Massachusetts, and when he first read the Blue Bloods pilot, one scene stopped him cold: the Reagan family Sunday dinner. In a 2013 interview with HuffPost, he remembered exactly why.

"Blue Bloods is a throwback. Shows don't focus on families like this anymore," he said. "That dinner scene grabbed me. I've felt that same heat — my dad staring me down while my sister and I argued. That's the same energy Tom brings with Bridget at the table."

Bridget Moynahan, who plays Erin Reagan, has been part of those dinner scenes from the beginning. The dynamic they create together — the weight of a patriarch who does not need to raise his voice — is something Wahlberg recognized from childhood and has been playing against ever since.

The relationship between Wahlberg and Selleck shifted after Wahlberg's mother, Alma, died in 2021. Selleck, who had always been something of a gruff presence on set, made room for something more direct.

"I call him Dad now, and he calls me son," Wahlberg told Entertainment Tonight. "He used to kind of grumble at me, like, 'This music guy's a little weird.' Now he gives me big hugs. And let me tell you, a hug from Tom Selleck — that's a big deal."

Blue Bloods ended its 14-season run in December 2024, making it one of the longest-running dramas in CBS history. The Reagan family dinner, which became the show's signature — critics occasionally mocked it, fans consistently defended it — turned out to be exactly the thing that held the whole production together. Wahlberg knew that from the audition. Selleck, apparently, had known it longer than that.