Caroline Mary Aherne was born on 24 December 1963 in Ealing, west London, the second child of Irish parents Bartholomew Edmond 'Bert' Aherne, a railwayman with London Transport, and Mary Frances 'Maureen' Aherne (née Regan). From the age of two she was brought up in Wythenshawe, south Manchester. Like her brother Patrick, she had retinoblastoma in childhood, which left her partially sighted in one eye. She attended the Hollies Convent FCJ School in West Didsbury, Xaverian College in Rusholme, and then studied drama at Liverpool Polytechnic. Comedy became her refuge early on, a way of navigating a working-class Catholic upbringing and a home life she would later mine for some of the most truthful sitcom writing Britain has ever produced.
She began performing on the Manchester comedy circuit in the late 1980s and early 1990s, developing characters such as the country singer Mitzi Goldberg and the nun Sister Mary Immaculate. The Mrs Merton character had originated in radio and local television spots before Aherne rose to national prominence in the BBC Two mock chat show The Mrs Merton Show, in which Aherne, aged thirty beneath elaborate old-age make-up, played a sweetly lethal pensioner interviewer. The 1996 episode asking Debbie McGee 'what first attracted you to the millionaire Paul Daniels?' became one of the most quoted moments in British television history.
In 1998 she co-created and co-wrote The Royle Family with Craig Cash, drawing on the rhythms, silences and absurdities of her own family life. As Denise Royle she gave a performance of almost miraculous stillness, and the show itself redefined the British sitcom: no studio audience, no catchphrases, just a family on a sofa being painfully, brilliantly real. It won BAFTAs, drew audiences of millions, and is regularly cited by writers and comedians as a touchstone for truthful television comedy.
Aherne withdrew from the spotlight for long periods, battling illness and a well-documented desire for privacy. She returned to write and narrate the ITV comedy-drama The Fattest Man in Britain in 2009 and co-wrote later Royle Family specials, including the 2012 Christmas special. She died of cancer on 2 July 2016, aged 52, leaving a body of work that remains unmatched in its warmth, honesty and comic precision.