Tom Selleck, who plays family patriarch Frank Reagan on Blue Bloods, has long been known for his leadership both on and off the screen. One particularly meaningful gesture he made early on reportedly played a key role in convincing co-star Donnie Wahlberg to stick with the show. At a crucial moment, Selleck took Wahlberg aside and let him know how much he valued his presence and energy on set, telling him he was essential to the show’s heart and rhythm. That quiet but powerful moment helped Wahlberg feel seen and appreciated.

Wahlberg, who plays Detective Danny Reagan, was still feeling things out at the time and wasn’t entirely sure how long he’d stay. But Selleck’s words carried real weight. Coming from a veteran actor and the unofficial leader of the cast, that kind of personal encouragement had a lasting effect. It made Wahlberg feel like part of a true team—more like a family, which fits the spirit of the show perfectly.

That supportive relationship between Selleck and Wahlberg has continued throughout the show’s long run. The genuine respect between the two is something fans have often picked up on, both in interviews and through the chemistry their characters share on screen. Selleck’s ability to bring people together, not just as a character but as a colleague, is a big part of why Blue Bloods has remained so strong over the years.