L
Life Cast

Why John Wick's Wife Helen Looks So Familiar

Author

Rachel Newton

Published Aug 07, 2026

Lately, the best place to see Moynahan has been on the CBS procedural drama Blue Bloods, where she plays Erin, the only daughter of New York City Police Commissioner Frank Reagan (Tom Selleck). While her brothers Danny (Donny Wahlberg), Jamie (Will Estes), and the deceased Joe followed their father into the family business of municipal policing, Erin Reagan took the Jack McCoy rather than the Lennie Briscoe route, becoming a New York County Assistant District Attorney.

Any character on a show that's been running for 11 seasons will have seen her fair share of ups and downs, and Erin is no different. She's had a variety of love interests since divorcing her husband Jack Boyle (Peter Hermann) — including multiple people who either were or would become the District Attorney, her boss, which caused her to turn them down. She's watched her daughter Nicky (Sami Gayle) grow up. Multiple times, she's had to be saved from being held at gunpoint by members of her family, including a time where a defendant shot her while in the courthouse.

Blue Bloods' busy, network-drama schedule –– there have been more than 220 episodes –– has kept Moynahan busy for the better part of a decade, with her appearing in only a handful of other film roles during that time. (These include Battle: Los Angeles, Midnight Sun, Crown Vic, and two of the three John Wick movies that have been released thus far.) Perhaps that made a gig as John Wick's wife especially appealing — something small, that wouldn't require much of a time commitment on her end, that would help keep the memory alive.