Michael "Mike" Hanlon was one of the members and the last member to join The Losers' Club, also the "Lucky Seven" and only African American child in the group. He is one of the characters from It , who lived in Derry, Maine. He is good friends with Bill Denbrough, Stan Uris, Eddie Kaspbrak, Beverly Marsh, Richie Tozier and Ben Hanscom.
Mike is the only one of the Losers to stay behind in Derry (and thus the only one to retain his memory of the events of 1958) and becomes the town librarian. He is the one, who beckons the others back, when the killings begin again in 1985. His father kept an album filled with photos that were important to Derry's history, including several of Pennywise the Clown. Through the knowledge he acquires of Derry and It, he becomes an amateur historian of the town. He is seriously wounded by Henry Bowers and nearly dies. He is not part of the finale battle against IT because of his injuries. He is almost murdered by a man who was under the control of IT while in the hospital. He later recovers from his wounds, but, like the others, starts to lose his memory of the experience.