Katy Sexton MBE (born 21 July 1982, Portsmouth, England) is a female Olympic swimmer from Great Britain. She became the first British swimmer to win a World Championship title, when she won the Women's 200m Back at the 2003 World Championships. She is twice an Olympian and has represented Great Britain in 4 World Championships, the first in 1998 when she was just 15, and in 3 Commonwealth Games. She was given the MBE for services to swimming in the 2004 New Year Honours list.