Hyndman was born in Grantham but grew up in Australia where she was educated at St Aloysius College, Adelaide.
She moved back to the UK and attended King Edward VII School (Melton Mowbray), before reading English Literature at Royal Holloway, University of London and Journalism at De Montfort University.
In November 2008, she became an anchor for ITV London regional news programme London Tonight, where she presented the show in place of main presenter Katie Derham, who primarily appeared on ITV News.
Hyndman ran the London Marathon on 13 April 2008 to raise money for the charity H.E.A.R.T UK.
Prior to June 2010 she had used her maiden name and abbreviated her first name, going by Alex Hyndman - the name she reverted to in the summer of 2015.