Janet Ellis (born September 16, 1955) is a television presenter and former actress, who appeared on BBC children's television during the 1980s. She is best remembered as a presenter on Blue Peter, a role she landed after hosting the award-winning children's programme Jigsaw.

She has three children, Sophie Ellis-Bextor (27), Martha-Rose (15) and Jackson (19).

Her first television appearance was a bit part in The Sweeney. Her big break came in 1979, when she played Teka in the Doctor Who story The Horns of Nimon.

Ellis joined Blue Peter on April 28, 1983, and during her four-year stint, she presented with Simon Groom, Sarah Greene, Peter Duncan, Michael Sundin, Mark Curry and Caron Keating. When Ellis left Blue Peter on June 20, 1987 to have her second child, there were rumours she had been sacked because she wasn't married to the father. However, the truth is that she decided to leave upon falling pregnant. Also, contrary to popular public belief, the child in question wasn't her pop singer daughter Sophie Ellis-Bextor, who was born eight years earlier and had even appeared with her mother on the show.

Ellis went on to present Open Air for the BBC, and has since presented a huge range of programmes on topics such as gardens, cars, holidays, cookery and childcare. She is a frequent contributor to children's charity Scene & Heard.

She is the author of How To Get Married Without Divorcing Your Family with Caron Keating, and currently (as of 2005) presents The Great Garden Challenge for Channel 4. She is also a regular panelist on five's The Wright Stuff.