Denise van Outen has joined 'Neighbours'.

Denise van Outen

Denise van Outen

The 45-year-old actress will portray Prue Wallace, the enigmatic mother of Harlow Robinson - played by Jason Donovan's daughter Jemma Donovan - and 'Good Morning Britain' showbiz reporter Richard Arnold will also make a cameo appearance in some of her scenes.

Denise said: "I am thrilled to be joining the cast of one the world's most iconic shows, 'Neighbours'.

"To be asked is a privilege and I am very excited to get to work on a really fun storyline first in London and then heading over to Melbourne.

"I can't say too much just yet but my character Prue is heading to Ramsay Street to stir things up and I can't wait."

While Denise will begin 'Neighbours' life shooting scenes at London's St James Park this week, alongside Stefan Dennis (Paul Robinson) and Rebekah Elmaloglou (Terese Willis), she will head to the show's Melbourne set to continue filming her scenes.

Richard - who made a cameo in Channel 4 soap 'Hollyoaks' last year - will star as Graham, a guy who exerts an unhealthy influence over Prue.

He said: "I always knew my career would hit a 'dead end' eventually but I never dreamed it would do so in such spectacular fashion joining the cast of 'Neighbours', home to the most famous cul-de-sac in television.

"G'Day Britain."

Stefan is also delighted about the pair joining the Channel 5 soap.

He added: "We love the Brits and being in this incredible city. Getting the chance to work with Denise and Richard is a real treat."

Denise - who played Karin Smart in 'EastEnders' in April 2015 - and Richard, who will only appear in one 'Neighbours' episode, will feature on screen later this year.

'Neighbours' airs Monday to Friday on Channel 5 at 1:45pm and 5:30pm.