The hit CBS series Blue Bloods has had remarkable staying power. Thirteen seasons in, the police drama continues to draw a devoted fan base. Since the first episode, Tom Selleck has held the position of New York City Police Commissioner, as well as the father of the Reagan family. He’s spent over a decade on the show, and he was a well-established star when it debuted. How old was he when the series began, and how old does that make him today?

How old was Tom Selleck during Season 1 of ‘Blue Bloods’?

When Selleck signed on to play Frank Reagan in 2010, he was already a household name. In fact, he had such a long history that producers thought it would be a good idea for him to shave his iconic mustache to help audiences see him as a new character. They worried that fans would remember his classic roles, especially his work as the charismatic Thomas Magnum in Magnum P.I.