She attended the Holy Faith Convent school, in Clontarf, Dublin, where she first started acting, in addition to being a member of the local amateur dramatics society.
The character was devised by Tony Warren, to provide some variation to the north-of-England accents that dominated among the original cast.
The departure was part of a cull of more than half-a-dozen characters by Coronation Street's new producer, Tim Aspinall, which also included the death of Martha Longhurst (Lynne Carol).
[4] Keogh's later television roles included starring in Z-Cars in 1974, a 1985 comedy drama, Mary in Inside Out, appearing as Imelda Egan in the BBC Northern Ireland drama Ballykissangel from 1997 to 1999, and as Mary Carroll, the Royles' neighbour in the Granada Television comedy The Royle Family between 1998 and 2006.
In Ireland, she became an original cast member of RTÉ's soap opera Fair City, playing Mary O'Hanlon from 1989 until 1995.
[2] Keogh coached Barbra Streisand on how to speak with a cockney accent for her 1970 film, On A Clear Day You Can See Forever, despite her being a Dublin native.
[3][6] In 2007, she appeared in a spoof Irish election commercial on behalf of Alone, a charity for the elderly, as "Betty from the Grey Tigers party".
Here Comes Trouble!, in 1978, at the Donmar Warehouse, and Mrs Madigan in Juno and the Paycock, in 1980, at the Aldwych Theatre, as part of the Royal Shakespeare Company.
[6][4] Keogh had Alzheimer's disease and died on 31 December 2017, aged 93, at St Columba's Hospital, in Thomastown, County Kilkenny, Ireland.