Danniella Westbrook (born 5th November 1973 in Walthamstow) appeared as Sam Mitchell from 1990 to 1993 and intermittently from 1995 to 2010 as well as making a guest appearance in 2016.

Away from Albert Square she has presented various shows, and was also a contestant on ITV's I'm a Celebrity... Get Me Out of Here! in 2003. She competed in the 2010 series of Dancing on Ice with US Pairs Skater Matthew Gonzalez and finished fourth in the competition.

Westbrook struggled with a much-publicised cocaine addiction throughout the 1990s and early 2000s, which caused the complete erosion of her nasal septum/Colonna. She sought treatment and no longer uses drugs. She is married with two children, and released her autobiography, The Other Side of Nowhere, in 2006.

In 2019, after the actress had claimed to be cocaine-free for fourteen years, it was revealed that she was back taking cocaine. She then appeared on the Jeremy Kyle Show in which she was then sent to rehab.