Nicola Kathleen Stapleton (born 9 August 1974 in Elephant and Castle, London) is an English actress. She is best known for her roles in EastEnders as Mandy Salter and Emmerdale as Danielle Hutch. A graduate of the Sylvia Young Theatre School, Stapleton began her career at an early age, appearing in films such as Hansel and Gretel and on television in the children's show Simon and the Witch in 1987. In 1992, she secured a high-profile role on British television as Mandy Salter in the BBC soap opera EastEnders. In 1994, Stapleton quit the role, but in 2011, returned to the role after 17 years. In 2012, she left the role for a second time. Stapleton's other notable television roles include that of Janine Nebeski in ITV's Bad Girls (2005–06) and Joe Nardone in Channel 4's Young Person's Guide to Becoming a Rock Star (1998). In 2017, she joined Thomas & Friends as the voice of Rosie, taking over from Teresa Gallagher in the UK and Jules de Jongh in the US. 28 October 2017 marked Nicola's third appearance in 'Casualty' playing her third different character in the show.