Rosalind Knight has died at the age of 87.
Born on 3rd December 1933 in Marylebone, central London, she died on Saturday 19th December, her family said in a statement.
"It is with huge sadness that the family of Rosalind Knight announce her death following a glorious career as a well-loved actress in theatre, TV and film.
"She was known to so many generations, for so many different roles, and will be missed as much by the kids today who howl at Horrible Grandma in Friday Night Dinner as by those of us who are old enough to remember her in the very first Carry On films."
Knight featured as one of the schoolgirls in 1957's Blue Murder At St. Trinian's, the second film in the celebrated series, and later as a teacher in 1980 revival The Wildcats Of St. Trinian's, the fifth film.
Recently, she had played the recurring guest role of Cynthia 'Horrible Grandma' Goodman in the Channel 4 sitcom Friday Night Dinner. Her opposite, grandmother Nellie, was played by Frances Cuka, who died in February.
Knight's daughters, theatre director Marianne Elliott and actor Susannah Elliott, said she would be remembered for her "immense spirit and sense of fun, and her utter individuality".
They explained: "Our mother had the most astute, vibrant personality and made people laugh wherever she went. She was a great reader, art lover and raconteur. She contributed in a voluntary way to the theatrical world through her involvement in the building of the Royal Exchange Theatre, alongside her husband Michael Elliott, and her support for the Actors Centre and the Ladies' Theatrical Guild.
"She was an active member of her local history society and opera society, and was a fierce campaigner and fundraiser for the Hogarth Trust.
"She will be greatly missed by all who knew her".