Katy Hill was born on 15 April 1971 in Poole, Dorset, where her father, Chris, was then a curate (trainee vicar) at a local church. Katy has two siblings: an elder brother, Simon, and a younger sister, Naomi. Her father, Chris Hill, now regularly contributes to Trans World Radio.

Hill gained nine ‘O’ levels and four ‘A’ Levels at St. Edward’s Church of England School in Romford, London. She worked for free at the local radio station BBC Essex, to gain the experience required to become a presenter. Her journey into the media world began with voluntary work at EastWard Hospital Television in Essex, where she honed her skills before presenting Katy’s Capers on BBC Radio Essex, which eventually led to a role at Nickelodeon.

Whilst working for BBC channel controllers and the Head of Children’s Television as a secretary, she bombarded the editor of Blue Peter with showreels, which resulted in her winning an audition place. On 23 June 1995, Hill joined the Children’s BBC television programme Blue Peter, ultimately leaving on 19 June 2000. Her assignments included living with a family in Mongolia for a week, training with the England football squad for a FIFA World Cup special, joining the Cirque du Soleil, and making objects from yoghurt pots and sticky-backed plastic.

She now hosts her own lifestyle and parenting blog at katyhill.com. She is married to the former Live & Kicking presenter Trey Farley and the family resides in Los Angeles.