Thomas William Selleck is an American actor, film producer, California Army National Guard veteran, and National Rifle Association (NRA) spokesman. He is most known for starring as private investigator Thomas Magnum in the television series Magnum, P.I., as Peter Mitchell in Three Men and a Baby, and as NYPD Commissioner Frank Reagan in Blue Bloods on CBS since 2010. Selleck has appeared in more than 50 film and television roles since Magnum, P.I., including Three Men and a Baby, Quigley Down Under, Mr. Baseball, and Lassiter. He appeared as Dr. Richard Burke on Friends and as A.J. Cooper on the TV series Las Vegas.