Actress Barbara Windsor, best known as the buxom, blonde-haired star of Britain's hit Carry On film franchise, has died at the age of 83, her husband said Friday.

Windsor made nine appearances in the innuendo-laden comedy films, and later became a mainstay as pub landlady Peggy Mitchell in the popular television soap opera EastEnders.

She was diagnosed with Alzheimer's in 2014 and campaigned for better care for those suffering with dementia and associated diseases.

Her husband, Scott Mitchell, who was at her side in the London care home when she died, said Windsor's "final weeks were typical of how she lived her life".

He added she was "full of humour, drama and a fighting spirit until the end".

Mitchell said he, her family and friends would remember her with "love, a smile and affection for the many years of her love, fun, friendship and brightness she brought to all our lives and the entertainment she gave to so many thousands of others during her career".

Boris Johnson (right) and Barbara Windsor hold hands after a meeting regarding dementia care in the garden at 10 Downing Street last year. Photo: Simon Dawson/Pool/AFP

Prime Minister Boris Johnson, who met Windsor at Downing Street last year to highlight concerns over dementia care and once had a cameo with her in EastEnders, led the tributes.

"So sad about Barbara Windsor, so much more than a great pub landlady and Carry On star," he tweeted. 

"She campaigned for the lonely and the vulnerable – and cheered the world up with her own British brand of harmless sauciness and innocent scandal."

Windsor – often known as 'Babs' – was made a dame by Queen Elizabeth II in 2016 for her work with charities supporting the elderly and veterans, and her services to entertainment.

Born in the east London area of Shoreditch, the actress changed her name from Barbara Deeks in 1953, taking inspiration from the queen's coronation in the same year.

Windsor starring alongside Sid James in the film 'Carry On Girls'. Photo: Rex Features

She made her debut in London's West End at the age of 13 but it was the Carry On films, which ran from the 1950s to 1970s, that made her name and turned her into a very British sex symbol.

The Carry On humour mined a particular British tradition of saucy seaside postcards and was rich with innuendo, double entendres and high camp.

Windsor, who never modified her Cockney accent, recalled it was a single scene in Carry On Camping (1969) when her bikini top flew off during an exercise scene that made her famous.

But she was also a tabloid favourite, not least because of her colourful love life, which included affairs with Carry On co-star Sid James and marriage to Ronnie Knight.

Knight, whom she later divorced after he fled to Spain while wanted in connection with a security van robbery, was an associate of notorious gangland figures Ronnie and Reggie Kray.

She married Mitchell in 2000.