Moynahan will make a special guest appearance as Erin Reagan in the premiere and will also direct an upcoming episode of the spinoff

Bridget Moynahan will reprise her character of Erin Reagan in the series premiere of Boston Blue, the spinoff series that follows Erin’s brother Danny ( Donnie Wahlberg) as he moves from New York to Boston. Moynahan is also set to direct an episode of the new show later in the season; she previously helmed three episodes of Blue Bloods .

"More fun (and surprises) to come," Wahlberg teased. "Let’s go!" Donnie Wahlberg is reuniting with a key member of the Blue Bloods family. The New Kids on the Block star celebrated the announcement of his on-screen sister,