Rowlands also appeared quite frequently on television early in her career. Amongst the various series in which she appeared, were several appearances in Gert and Daisy (1959) as Bonnie, as well as appearing in 2 episodes of Danger Man (as different, unrelated characters) and in The Avengers episode "Love All". Rowlands played the role of a love interest for George called "Beryl" in the 1979 Christmas special and final episode of George and Mildred
Rowlands developed breast cancer and had to abandon her plans to become an acting Teacher, and quietly retire. She died of the disease in an East Sussex hospice, three days after her 74th birthday. She was survived by her only son, Alan (born 1963).
Rowlands began her career in the chorus of Annie Get Your Gun, followed by a summer season in Torquay. She then spent several years with the Players' Theatre in London, before making her West End debut in Sandy Wilson's musical Valmouth. It was at this time she met her Future husband, the Composer Malcolm Sircom. They divorced in 1967.
She made her debut in the Carry On films in Carry On Again Doctor in 1969 and soon became a regular member of the team, usually playing the dowdy, put-upon wife or the long-suffering secretary. Between 1969 and 1975 she appeared in nine of the films in increasingly large roles, appearing in Carry On Again Doctor, Carry On Loving, Carry On Henry, Carry On Matron, Carry On Abroad and Carry On Dick - more substantial roles include Carry On At Your Convenience, Carry On Girls and Carry On Behind.
From 1971 to 1976, she played Betty, the feckless neighbour in the popular ITV sitcom Bless This House, which starred fellow Carry On star Sid James. Her other television credits at this time included appearances with comedians such as Les Dawson and Dick Emery. In the early 1980s, she appeared with Thora Hird in the sitcom Hallelujah!, in which they played an aunt and niece in The Salvation Army. In 1991 she appeared in an episode of Zorro filmed in Madrid, Spain.
Rowlands also appeared in film and TV versions of two of Frances Hodgson Burnett's books: "Little Lord Fauntleroy" and "A Little Princess." In the 1980 TV movie "Little Lord Fauntleroy," with Alec Guinness (as Earl of Dorincourt) and Ricky Schroder (as "Ceddy", Little Lord Fauntleroy), she played a village lady named Mrs. Dibble. In the BBC production of the 1986 TV miniseries "A Little Princess," she played the role of the "Baker's Wife," who gives Sara 6 buns for fourpence and later takes under her wing a homeless beggar girl Sara had befriended.
Later television credits include The Cazalets, The Canterbury Tales, The Cater Street Hangman, Get Well Soon, Vanity Fair, Murder Most English, and Bottom for the BBC. In 2002, she was a guest on the paranormal series Most Haunted. Rowlands took part in several DVD audio commentaries along with other surviving stars of the Carry On films in 2003.