who was the oldest brother on the show blue bloods, joe or danny?
Blue Bloods ActorsTv Blue BloodsBloods CastBloods Tv STv ReaganReagan BlueReagan FamilyJoe ErinDanny JoeForward. Joe Reagan the second oldest son (So that concludes: Danny, Joe, Erin and Jamie in order or Danny Erin Joe and Jamie)
United States Marine (Veteran) Daniel Fitzgerald âDannyâ Reagan is the oldest child of Frank and Mary Reagan, and the older brother of Erin, Joe, and Jamie Reagan. Danny is an investigator of New York City's 54th Precinctâs Detective Squad, specializing in Major Crimes, and doing what needs to be done to serve justice in the fight against crime.