In an Instagram post, Wahlberg shared a photo with his former Blue Bloods co-star Bridget Moynahan to announce that she would be reprising her role as Danny’s sister, Erin Reagan, in the series premiere of Boston Blue. “Reunited and if feels so good! So excited to have my dear friend, and TV sister [Bridget Moynahan], join me for a special guest appearance in the premiere episode of #BostonBlue!” the post’s caption read. Wahlberg also revealed that Moynahan will “be bringing her incredible directing talents” to Boston Blue. “More fun (and surprises) to come. Let’s go!” the actor concluded.

A New Chapter in the Blue Bloods Universe

Announced in February 2025, Boston Blue, like its predecessor Blue Bloods, will center around a multi-generational family with ties to law enforcement. Only the Reagans won’t be the focus this time around; instead, it will be the Silvers, led by patriarch Reverend Peters, portrayed by Ernie Hudson. Wahlberg’s Danny Reagan will cross paths with this family when he is partnered with Sonequa Martin-Green’s Lena Silver, Reverend Peters’ granddaughter and a “rising star” in the Boston Police Department. The rest of the main cast includes Maggie Lawson as Lena’s stepsister Sarah Silver, Marcus Scribner as her younger brother Jonah Silver, and Gloria Reuben as her mother Mae Silver.