List of Famous people who are 56

Peter Mattei is a Swedish operatic baritone, particularly known for his performances in Mozart's baritone roles.

Michael O'Connor is an English costume designer.

Jane Maria Swift is an education executive, speaker and former political leader who served as the 69th lieutenant governor of Massachusetts from 1999 to 2003 and, concurrently, as acting governor from April 2001 to January 2003. She is the only woman to perform the duties of governor of Massachusetts. At the time she became acting governor, Swift was 36 years old, making her the youngest female governor or acting governor in U.S. history. Since leaving elected office she has worked in the private sector as a Chief Executive Officer, board member and consultant for education technology companies, as well as serving on corporate and non-profit boards, teaching and lecturing on topics pertaining to women and leadership, and supporting philanthropies that address issues of importance to women and girls. She was CEO of Middlebury Interactive Languages from 2011 to 2017.

Juan Ignacio Cirac Sasturain, known professionally as Ignacio Cirac, is a Spanish physicist. He is one of the pioneers of the field of quantum computing and quantum information theory. He is the recipient of the 2006 Prince of Asturias Award in technical and scientific research.