|Born||2 January, 1958
|Alma mater||University College London|
She attended Camden School for Girls, then a selective grammar school, on Sandall Road in Kentish Town. She would later become a critic of grammar schools. She studied Economics and Economic History at UCL.
She was an adviser to Cherie Blair from 1995-2003. She is not keen on what she calls sharp-elbowed middle class parents getting into some of the better state schools. In 2005, along with Melissa Benn, she co-wrote a pamphlet A Comprehensive Future: Quality and Equality for all our children and is active in the campaign against the Trust Schools white paper, appearing alongside such Labour Party luminaries as Neil Kinnock and Estelle Morris at campaign meetings.
She is Vice-Chair of Comprehensive Future, an organisation that promotes the perceived advantages of comprehensive schools in the UK. Her children attend state schools in the Camden LEA, and she is a school governor at two schools. Millar's articles have appeared regularly in the education supplement of The Guardian newspaper since 2003. She is Chair of Trustees of the Family and Parenting Institute.
In 2009, Millar wrote The Secret World of the Working Mother, a book about finding the balance between working and being a mother.
Her partner, and the father of her two sons (born November 1987 and July 1989) and daughter (born May 1994), is Alastair Campbell, Tony Blair's former Director of Communications. Her children attended state schools in Camden LEA. They live in Gospel Oak.