Actress Jamila Massey is 76 years old and plays Upma Parekh. She's appeared before in Eastenders, Brookside, Crossroads, The Archers, Albion Market, Jewel in the Crown, Minder, and Z Cars! Jamila has been on Coronation Street before about six years ago and has played another role. Anyone remember who this was? She told the BBC she loves playing Sunita's aunt: "I enjoyed playing the character although she is not too forbidding, like the aunts in the novels of PG Wodehouse."
And actress Indira Joshi plays the other aunty, Grishma. She's the one who's been in The Kumars at No. 42. Her IMDB listing is here, it's pretty extensive.
See also: Where have you seen...?
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