Rachel Allen (née O'Neill) is an Irish celebrity chef, known for her work on television and as a writer.

A book, Rachel's Favourite Food, accompanied the series, published by Gill & Macmillan.

Two further TV series and books followed, Rachel's Favourite Food for Friends and Rachel's Favourite Food at Home; reruns of the latter became part of Create's television schedule in the United States starting in September 2010.

[11] March 2017, Allen opened her first restaurant 'Rachel's' in Cork's Washington Street, part of a business venture with her husband, Isaac, and publican Paul Montgomery.

[13] September 2019, Rachel Allen returned as a judge and co-host with chef Marco Pierre White on the popular Irish television series The Restaurant.

It was when an RTE producer enrolled in a cookery course at the school asked Rachel if she would like to do a TV show.

[3][19] In July 2012, she received an Honorary Doctorate in Science from the University of Ulster at Belfast's Waterfront Hall for her contribution to the culinary arts.