Sarah Jayne Dunn is an English actress, known for portraying the role of Mandy Richardson on the Channel 4 soap opera Hollyoaks from 1996 until 2021. In November 2021, Dunn was dropped from Hollyoaks after she joined the adult subscription service OnlyFans.

Mandy Richardson is a fictional character from the British Channel 4 soap opera Hollyoaks, played by Sarah Jayne Dunn. She first appeared on 7 October 1996 and has been involved in various storylines, including dealing with sexual abuse while she was a child by her father Dennis, the suicide of her brother Lewis, and an on-off relationship with Tony Hutchinson before the couple married. Mandy had a miscarriage causing her to hit Tony. Mandy and Tony had a daughter together who they named Grace, only for her to die from sudden infant death syndrome. This led to the character and Dunn's exit from the serial in 2006. Dunn made a brief return in 2007 before making a return for six months in 2008. Dunn reprised her role as Mandy in 2010; in September 2011, Dunn announced her departure from the soap, and Mandy made her last appearance on 2 September 2011 before departing off-screen. Dunn later returned to her role in the sixth series of Hollyoaks Later in October 2013. In June 2017, it was announced that Dunn had reprised the role again and that Mandy would appear from July alongside Luke Morgan, played by Gary Lucy. Mandy returned on 26 July 2017. In November 2021, it was announced that Dunn's contract with Hollyoaks had been terminated due to starting an OnlyFans; viewers of the soap criticised the decision and Dunn herself voiced her disappointment with the production team. Her final scenes aired on 27 December 2021, and Mandy was given an off-screen departure on 31 January 2022.