Ellis-Bextor was born in London to Janet Ellis, who was later a presenter on BBC's children's television programmes Blue Peter and Jigsaw, and Robin Bextor, a film producer and director: they separated when she was four.
As a child, Ellis-Bextor occasionally appeared on Blue Peter alongside her mother, who presented the programme.

She attended St. Stephen's School and later Godolphin and Latymer School in Hammersmith.
Among her earliest public performances were with the W11 Opera children's opera from the age of thirteen, and she is now a patron of the organisation.

Ellis-Bextor has said "I didn't see myself as a good-looking girl and that was good, because I didn't rely on it.... I've now found lots of like-minded weirdos so it's OK."
Ellis-Bextor was born in London to Janet Ellis, who was later a presenter on BBC's children's television programmes Blue Peter and Jigsaw, and Robin Bextor, a film producer and director: they separated when she was four. As a child, Ellis-Bextor occasionally appeared on Blue Peter alongside her mother, who presented the programme.
She attended St. Stephen's School and later Godolphin and Latymer School in Hammersmith. Among her earliest public performances were with the W11 Opera children's opera from the age of thirteen, and she is now a patron of the organisation.
Ellis-Bextor has said "I didn't see myself as a good-looking girl and that was good, because I didn't rely on it.... I've now found lots of like-minded weirdos so it's OK."
Sophie Ellis-Bextor