Erin Reagan
| Erin Reagan | |
|---|---|
| Blue Bloods character | |
Actor, Bridget Moynahan, in 2016. | |
| First appearance | "Pilot" September 24, 2010 |
| Created by | Robin Green Mitchell Burgess |
| Portrayed by | Bridget Moynahan |
| In-universe information | |
| Full name | Erin Reagan |
| Alias | Erin Reagan-Boyle (formerly) |
| Gender | Female |
| Occupation | Prosecutor |
| Family | Francis Xavier "Frank" Reagan (father) Mary Margaret Reagan (mother)† Daniel Fitzgerald "Danny" Reagan (older brother) Joseph Conor "Joe" Reagan (younger brother)† Jameson "Jamie" Reagan (younger brother) |
| Spouse | Jack Boyle (ex-husband) |
| Significant other | Charles Rosselini (romantic interest) Jacob Krystal (romantic interest) Jack Boyle (fling) Robert McCoy (ex-boyfriend) |
| Children | Nicky Reagan-Boyle |
| Relatives | Henry Reagan (grandfather) Betty Reagan (grandmother)† Peter Christopher Reagan (uncle)† Charles Reagan (great-grandfather)† Linda Reagan (sister-in-law)† Eddie Janko (sister-in-law) Jack Reagan (nephew) Sean Reagan (nephew) Joe Hill (nephew) |
| Religion | Catholic |
| Nationality | Irish-American |
| DA career | |
| Department | Manhattan District Attorney's Office |
| Years of service | 2000s – Present |
| Rank | Bureau Chief |
Erin Reagan is a fictional New York County Assistant District Attorney, and one of the main characters in the television series, Blue Bloods, being the only daughter of Frank Reagan. She is portrayed by Bridget Moynahan.
Co-star Donnie Wahlberg had encouraged Moynahan to take the role after working with her on a 2008 TV pilot called Bunker Hill.
Erin has been described as "brilliant but also incredibly strong", and as "the 'tough but feminine' Bureau Chief in the Manhattan District Attorney's Office who is the most small-l liberal of her family, but even she has no issue with police brutality if it gets the job done".
In July 2025, it was announced that the character would appear in the first episode of the spinoff series Boston Blue.