Sarah Jayne Dunn (born 25 September 1981) is an English actress, known for portraying the role of Mandy Richardson on the Channel 4 soap opera Hollyoaks from 1996 until 2021.

[2] Dunn first appeared on the Channel 4 soap opera Hollyoaks on 12 September 1996, walking into the video shop in the forty-third episode.

She returned in 2008 for six months, leaving in December after the disastrous wedding of Warren Fox (Jamie Lomas) and Louise Summers (Roxanne McKee).

On 2 June 2017, it was announced that Dunn would reprise her role as Mandy alongside Gary Lucy, who plays Luke Morgan, in the main show.

She explained that as a model, she was constantly compared to other women and her photos were edited to change her appearance without her consent; she opened the OnlyFans account to take control of her image.

In 2014/15 she played international charity worker Taylor Ashbie in the BBC One medical drama Casualty (Series 29, episodes 13 to 29), who became the girlfriend of cast regular Caleb Knight (Richard Winsor).

[6] Dunn appeared in a tour of The Vagina Monologues which began on 7 September 2009 at the Churchill Theatre, Bromley and ended on 8 December 2009 at the Jersey Opera House.

[8] When Harry met Sally then played at the Grand Canal Theatre in Dublin, Ireland for one week ending on 3 July 2010.

[9] In September 2007, it was announced that, along with her former Hollyoaks colleague Helen Noble and theatre actor Graham Tudor, she would be teaching students at a new acting school in Liverpool.