Diane the sofa woman is played by actress Julia Montgomery Brown. She's American (not Canadian, as I first assumed) and has a wealth of acting experience. See her IMDB profile here. She's even appeared in an episode of one of my favourite TV shows, The Sopranos. She also runs her own photography company.
See also: Where have you seen?
Mark the motorcycle medic, Mrs Waddle, Michael Rodwell's Aunt Barbara, Peter Barlow's cellmate Clelland, Carla Connor's solicitor Pauline Mansell, Pat Phelan, The Corrie clairvoyant, Eric's wife Doris, Audrey's date Henry, Lewis' friend Patrick,The Corrie Registrar, Marcus' friend Aiden, Kirsty's parents, Jenny Sumner, Corrie's prison Governor, Sunita's Aunties, Ken and Deirdre's pottery teacher, Tommy Duckworth, Mrs Hargreaves who died in Audrey's salon, Sally Webster's fella Jeff, Joy Fishwick's investigator, Charlotte's Parents, Ken Barlow's grandson James, Ken Barlow's son Lawrence, Dr Matt Carter, Saucy Charlotte, Izzy's dad Owen Armstrong,The Corrie coppers, Colin Fishwick, Trevor the binman, Connie Rathbone, Uncle Umed,Julie Carp's mum, Luke Strong, Sophie Webster's boyfriend, Eileen Grimshaw's dad, Norris' girlfriend, Graeme Proctor,Molly's Aunty Pam, Maria's mum and dad, Gail's dad, Scary Brian, Tina's dad, Tony Gordon's henchman, Little Simon Barlow
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