Hollyoaks bosses have cast Lizzie Roper as newcomer Sam Lomax.
Sam is the wife of Hollyoaks High teacher Danny and made her first appearance on screen in tonight's E4 first look airing (August 19).
Show chiefs did not announce Roper's casting before transmission as they wanted the appearance of Danny's partner to be a surprise for viewers.
Speaking exclusively to Digital Spy, Roper commented: "I'm having a ball after joining one of the friendliest casts. I'm so lucky getting to play Sam: one moment she's fun and feisty starting food fights, the next she's facing up to gangsters and doing everything she can to bring them to justice.
"She's not afraid of anything and has got a heart of gold, but when it comes to her family she's a lioness - don't mess with her!"
Sam will become a prominent character on screen in the coming weeks as Danny (Stephen Billington) desperately tries to juggle his stable family life and his secret relationship with John Paul McQueen (James Sutton).
Viewers know that Danny is also hiding another big secret as he is the father of established character Ste Hay (Kieron Richardson).
Sam and Danny's children - Ste's half-sisters - will also be joining the show as regular characters later in the year.
Roper has a number of previous screen credits including roles in Dead Boss, Shameless, Coronation Street and Waterloo Road.
Hollyoaks airs weeknights at 6.30pm on Channel 4, with first look screenings at 7pm on E4.
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