List of Blue Bloods characters

Danny Reagan
Blue Bloods character
Danny Reagan (Donnie Wahlberg)
First appearance	"Pilot" September 24, 2010
Created by	Robin Green Mitchell Burgess
Portrayed by	Donnie Wahlberg
Information
Full name	Daniel Fitzgerald Reagan
Gender	Male
Occupation	Police officer
Family	Frank Reagan (father) Mary Margaret Reagan (mother)† Erin Reagan (younger sister) Joseph Conor "Joe" Reagan (younger brother)† Jamison "Jamie" Reagan (younger brother)
Spouse(s)	Linda Reagan (wife)
Significant other(s)	Marianne Romano (ex-girlfriend)
Children	Jack Reagan Sean Reagan
Relatives	Henry Reagan (grandfather) Betty Reagan (grandmother)† Peter Christopher Reagan (uncle)† Charles Reagan (great-grandfather)† Jack Boyle (ex-brother-in-law) Wendy Lightner Nicky Reagan-Boyle (niece) Sofie Lightner (niece)
Religion	Catholic
Nationality	American
Police career
Department	New York City Police Department
Years of service	1990s – Present
Rank	Detective 1st Grade
Awards	American Flag Breast Bar World Trade Center Breast Bar NYPD Medal of Honor NYPD Combat Cross NYPD Medal for Valor NYPD Honorable Mention NYPD Meritorious Police Duty Marine Corps Service Award

This is an overview of the regular, recurring, and other characters of the TV series Blue Bloods.

Detective First Grade Daniel Fitzgerald "Danny" Reagan is the eldest son of Commissioner Frank Reagan. He is portrayed by Donnie Wahlberg.

The oldest son of the current New York City Police Commissioner Frank Reagan and his wife Mary, Danny grew up in Bay Ridge, Brooklyn with a younger sister, Erin, and two younger brothers, Joe and Jamie. He has been happily married to Linda since 1996, and they have two sons, Jack (b. 2001) and Sean (b. 2004). They live on Staten Island. During high school, he dated Marianne Romano (Charisma Carpenter), who was described by his partner Baez as "the queen bee, super good looking, a little crazy, and dynamite in the sack" to which he agreed. As a young man, Danny worked construction.

For a class project of Nicky's, Danny mentioned that when he was three years old, he wanted to be a firefighter for Halloween, but his grandfather Henry swore that as long as he was alive, no Reagan would ever be a member of the FDNY, got him into a police uniform, and he "never took it off" until he made Detective.

On the job for 15 years (as of season 1), Danny took a leave of absence from the New York City Police Department to serve two tours in the Iraq War as a Marine. Danny saw combat in Fallujah, and was the only member of his platoon to come home alive (resulting in some post-traumatic stress). During his time in the Marines, Danny was decorated for heroism.

He is old-school; his hotheadedness and harsh methods of detective work sometimes get him in trouble, which his father worries about. When asked if his son "crosses the line" and violates procedure from time to time, Frank answered, "I think he walks on the line". Danny is hard on other policemen and detectives when he feels they are unprofessional or not doing their duty to its utmost. He is currently assigned to the Detective Squad of the 54th Precinct, and partnered with Detective Maria Baez. In "Most Wanted", it is mentioned that he leads the Manhattan South Detective Borough in both collars and complaints. In "Love Stories", he and Baez are awarded the NYPD Medal for Valor for their actions in "Partners".